3 Interactions of Light Waves
|
|
- Bethany Williams
- 6 years ago
- Views:
Transcription
1 CHAPTER 22 3 Interactions of Light Waves SECTION The Nature of Light BEFORE YOU READ After you read this section, you should be able to answer these questions: How does reflection affect the way we see objects? What happens to light when it passes from one material into another? How do light waves interact with each other? National Science Education Standards PS 3c What Is Reflection? Light bounces off some objects and passes through others. Reflection happens when light bounces off an object. Light reflects off objects all around you. You see the objects because the reflected light travels to your eyes. You can use the law of reflection to predict where a light wave will travel after it reflects. The law of reflection states that the angle of incidence of light is equal to the angle of reflection. The angle of incidence is the angle at which a light beam hits an object. The angle of reflection is the angle at which the light bounces off the object. The law of reflection states that these two angles are equal. The Law of Reflection The beam of light traveling toward the mirror is called the incident beam. A line perpendicular to the mirror s surface is called the normal. The beam of light refl ected off the mirror is called the refl ected beam. STUDY TIP Organize Concepts As you read, make a Concept Map in your notebook. Try to include the vocabulary terms and the terms in italics. 1. Apply Ideas If a light beam hits a mirror at a 30 angle, what is the angle of incidence? 2. Apply Ideas What is the angle of refl ection? The angle between the incident beam and the normal is called the angle of incidence. The angle between the refl ected beam and the normal is called the angle of reflection. Interactive Textbook 415 The Nature of Light
2 REGULAR REFLECTION AND DIFFUSE REFLECTION Light reflects off most objects, such as mirrors and walls. Why can you see your reflection in a mirror, but not in a wall? The answer has to do with the surface the light reflects from. Some objects, such as mirrors, reflect all the light beams at the same angle. This is called regular reflection. Regular reflection allows you to see an image in a mirror or shiny piece of metal. Some objects, such as walls, reflect the light beams at many different angles. This is called diffuse reflection. Diffuse reflection prevents you from seeing images reflected off walls, furniture, or other rough surfaces. 3. Identify Circle the image that shows how light refl ects from a mirror. 4. Compare and Contrast What is the difference between a luminous object and an illuminated object? Regular reflection occurs when light beams are refl ected at the same angle. When your eye detects the refl ected beams, you can see a refl ection on the surface. Diffuse reflection occurs when light beams refl ect at many different angles. You can t see a refl ection because not all of the refl ected light is directed toward your eyes. SEEING OBJECTS You can see some objects because they produce light. You can see other objects because they reflect light. Luminous objects are light sources. Flames, light bulbs, and the sun are examples of luminous objects. Illuminated objects are visible because they reflect light. The reflected light travels from the objects to your eyes. The moon is an illuminated object. You see the moon because it reflects light from the sun to your eyes. You can see the body of a fi refl y because it is illuminated. You can see the tail of a fi refl y because it is luminous. Interactive Textbook 416 The Nature of Light
3 How Is Light Absorbed and Scattered? When you shine a flashlight, you can observe the light beam spread out and become dim farther from the flashlight. The light beam becomes dim because of absorption. It spreads out because of scattering. LIGHT ABSORPTION Absorption is the transfer of light energy into an object or a particle of matter. Air is full of particles, such as water droplets or dust. When light shines through the air, these particles absorb some of the light energy. The farther light travels from its source, the more its energy is absorbed by particles. Therefore, light is dimmer farther from its source. 5. Explain What makes a beam of light become dimmer as it travels away from its source? When light is absorbed by a particle, the light beam loses energy and becomes dim. LIGHT SCATTERING Scattering is the interaction of light with an object that changes the light s direction or energy. When light collides with a particle in the air, the light scatters in all directions. The scattering of visible light makes the sky look blue. Light with shorter wavelengths is scattered more than light with longer wavelengths. Blue light is scattered more by the atmosphere than red light. The red light passes more easily through the atmosphere. Therefore, the sky looks blue. 6. Explain Why is the sky blue? When light collides with a particle, it scatters in all directions. Scattering allows you to see objects outside a beam of light. Interactive Textbook 417 The Nature of Light
4 What Is Refraction? Refraction happens when a wave bends as it passes from one material into another. Light travels at different speeds through different materials. Therefore, passing from one material to another can change its direction. Light travels faster in a vacuum than in matter. Light travels faster in air than in glass or water. Light bends away from the boundary between the materials here because light travels more slowly in glass than in air. 7. Apply Concepts Which way will light bend when it passes from air to water? Explain your answer. Light in Light bends toward the boundary between the materials here because light travels faster in air than in glass. Critical Thinking 8. Infer What is an optical illusion? OPTICAL ILLUSIONS Light from a light source or reflected from an object travels in a straight line through the air to you. Your brain expects light to always travel in a straight line. However, when you look at an object under water, the light refracts, or bends. Because it doesn t travel in a straight line, you may see an optical illusion, such as the one shown below. Air Water Air Water Because of refraction, the cat and the fi sh see optical illusions. To the cat, the fi sh appears closer than it really is. To the fi sh, the cat appears farther away than it actually is. Interactive Textbook 418 The Nature of Light
5 SEPARATING COLORS White light contains all of the colors of visible light. Each color has a different wavelength. Different wavelengths travel at the same speed in a vacuum, but they travel at different speeds in glass. Therefore, some colors refract more than others when they travel through the glass. Colors with the shortest wavelengths refract the most. Colors with the longest wavelengths refract the least. Light passing through a prism is refracted twice once when it enters and once when it exits. Red light has a longer wavelength than other colors. Red light is refracted the least. Violet light has a shorter wavelength than other colors. Violet light is refracted the most 9. Identify What happens to light when it hits a prism? A prism is a piece of glass that uses refraction to separate white light into the colors of visible light. What Is Diffraction? Diffraction happens when waves bend around a barrier or through an opening. The amount a wave bends depends on two things: its wavelength and the size of the barrier or opening. Waves diffract the most when the barrier or opening is the same size as the wavelength or smaller. The wavelength of visible light is very small. It is about 100 times thinner than a human hair. Therefore, a light wave won t bend much unless it passes through a very narrow opening or around a sharp edge. Critical Thinking 10. Compare and Contrast How are diffraction and refraction of light alike? How are they different? DIFFRACTION YOU CAN SEE You will not often see light waves diffracting around objects. For example, you can t see the objects that are around the corner of a building. However, you can see some effects of light diffraction. For example, diffraction makes the edges of a shadow look blurry. Interactive Textbook 419 The Nature of Light
6 11. Describe Compared to the wavelength of the light, how large is the disk? This image shows light diffracting. A single wavelength of light is passing around the sharp edge of a tiny disk. 12. Identify What are the two kinds of interference? What Is Wave Interference? Interference happens when two or more waves combine to form a single wave. Interference occurs when two waves overlap. When waves overlap, they can combine by constructive interference or destructive interference. Constructive interference produces a wave with a larger amplitude than the original waves. Waves that combine by constructive interference create one wave with a stronger intensity. For example, light waves that combine by constructive interference produce one brighter light wave. Destructive interference produces a wave with a smaller amplitude than the original waves. Waves that combine by destructive interference create one wave with a weaker intensity. For example, light waves that combine by destructive interference produce one dimmer light wave. Constructive and Destructive Interference 1 Light of a single wavelength 2 The light waves diffract as they passes through two slits. pass through the tiny slits. 13. Identify What kind of interference produces the dark bands? 3 The diffracted light waves 4 The interference can be seen on a combine by both constructive and destructive interference. screen as bright and dark bands. The bright bands are the result of constructive interference. The dark bands are the result of destructive interference. Interactive Textbook 420 The Nature of Light
7 LIGHT INTERFERENCE YOU CAN SEE The experiment shown in the last figure used only one wavelength of light. However, the light you see around you every day is white light. White light contains many different wavelengths. The many waves don t usually combine in total destructive or constructive interference. This is why you do not usually see the effects of interference. Light Wave Interaction 14. Explain Why do we not usually see the effects of constructive and destructive light interference? 15. Describe Complete the Flow Chart with the information from this section. Interactive Textbook 421 The Nature of Light
8 Section 3 Review NSES PS 3c SECTION VOCABULARY absorption in optics, the transfer of light energy to particles of matter diffraction a change in the direction of a wave when the wave fi nds an obstacle or an edge, such as an opening interference the combination of two or more waves that results in a single wave reflection the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through refraction the bending of a wavefront as the wavefront passes between two substances in which the speed of the wave differs scattering an interaction of light with matter that causes light to change its energy, direction of motion, or both 1. Explain Why is a beam of light wider and dimmer when it hits a wall than when it leaves the flashlight? 2. Describe Use the vocabulary words to name the type of wave interaction that causes each condition. Condition Wave Interaction A log is sticking up from the water. It looks as if its top and bottom are not attached. The edge of a shadow is blurry. You can see your image in the mirror. A beam of light becomes dimmer farther away from its source. 3. Apply Ideas In a dark room, you can see the image on the screen of a television. However, you cannot see the table the television is sitting on. Why can you see the image but not the table? 4. Explain Why can you see your reflection in the bowl of a spoon but not in a piece of cloth? Interactive Textbook 422 The Nature of Light
SESSION 5: INVESTIGATING LIGHT. Key Concepts. X-planation. Physical Sciences Grade In this session we:
SESSION 5: INVESTIGATING LIGHT Key Concepts In this session we: Explain what light is, where light comes from and why it is important Identify what happens when light strikes the surface of different objects
More informationLight and Sound. Wave Behavior and Interactions
Light and Sound Wave Behavior and Interactions How do light/sound waves interact with matter? WORD Definition Example Picture REFLECTED REFRACTED is the change in direction of a wave when it changes speed
More informationThe Question. What are the 4 types of interactions that waves can have when they encounter an object?
The Question What are the 4 types of interactions that waves can have when they encounter an object? Waves, Wave fronts and Rays Wave Front: Crests of the waves. Rays: Lines that are perpendicular to the
More informationRay Optics. Lecture 23. Chapter 23. Physics II. Course website:
Lecture 23 Chapter 23 Physics II Ray Optics Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Let s finish talking about a diffraction grating Diffraction Grating Let s improve (more
More informationLight. Electromagnetic wave with wave-like nature Refraction Interference Diffraction
Light Electromagnetic wave with wave-like nature Refraction Interference Diffraction Light Electromagnetic wave with wave-like nature Refraction Interference Diffraction Photons with particle-like nature
More informationRay Optics. Lecture 23. Chapter 34. Physics II. Course website:
Lecture 23 Chapter 34 Physics II Ray Optics Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Today we are going to discuss: Chapter 34: Section 34.1-3 Ray Optics Ray Optics Wave
More informationConceptual Physics Fundamentals
Conceptual Physics Fundamentals Chapter 14: PROPERTIES OF LIGHT This lecture will help you understand: Reflection Refraction Dispersion Total Internal Reflection Lenses Polarization Properties of Light
More informationspecular diffuse reflection.
Lesson 8 Light and Optics The Nature of Light Properties of Light: Reflection Refraction Interference Diffraction Polarization Dispersion and Prisms Total Internal Reflection Huygens s Principle The Nature
More informationPhys 102 Lecture 17 Introduction to ray optics
Phys 102 Lecture 17 Introduction to ray optics 1 Physics 102 lectures on light Light as a wave Lecture 15 EM waves Lecture 16 Polarization Lecture 22 & 23 Interference & diffraction Light as a ray Lecture
More informationCh. 22 Properties of Light HW# 1, 5, 7, 9, 11, 15, 19, 22, 29, 37, 38
Ch. 22 Properties of Light HW# 1, 5, 7, 9, 11, 15, 19, 22, 29, 37, 38 Brief History of the Nature of Light Up until 19 th century, light was modeled as a stream of particles. Newton was a proponent of
More informationConceptual Physics 11 th Edition
Conceptual Physics 11 th Edition Chapter 28: REFLECTION & REFRACTION This lecture will help you understand: Reflection Principle of Least Time Law of Reflection Refraction Cause of Refraction Dispersion
More informationOptics: Laser Light Show Student Advanced Version
Optics: Laser Light Show Student Advanced Version In this lab, you will explore the behavior of light. You will observe reflection and refraction of a laser beam in jello, and use a diffraction pattern
More informationLecture 14: Refraction
Lecture 14: Refraction We know from experience that there are several transparent substances through which light can travel air, water, and glass are three examples When light passes from one such medium
More informationOptics Test Science What are some devices that you use in everyday life that require optics?
Optics Test Science 8 Introduction to Optics 1. What are some devices that you use in everyday life that require optics? Light Energy and Its Sources 308-8 identify and describe properties of visible light
More informationIntermediate Physics PHYS102
Intermediate Physics PHYS102 Dr Richard H. Cyburt Assistant Professor of Physics My office: 402c in the Science Building My phone: (304) 384-6006 My email: rcyburt@concord.edu My webpage: www.concord.edu/rcyburt
More informationLight Energy. Name: Key
Light Energy Name: Key What is Light? Make a list of things that give us light. How many can you think of? Answers will vary Count the items on your list. How many did you write? Light: Light is a form
More informationS2 Science EM Spectrum Revision Notes --------------------------------------------------------------------------------------------------------------------------------- What is light? Light is a form of
More informationSNC2D PHYSICS 4/27/2013. LIGHT & GEOMETRIC OPTICS L Light Rays & Reflection (P ) Light Rays & Reflection. The Ray Model of Light
SNC2D PHYSICS LIGHT & GEOMETRIC OPTICS L Light Rays & Reflection (P.402-409) Light Rays & Reflection A driver adjusts her rearview mirror. The mirror allows her to see the cars behind her. Mirrors help
More informationPhysics 10. Lecture 28A. "If Dracula can t see his reflection in the mirror, how come his hair is always so neatly combed?
Physics 10 Lecture 28A "If Dracula can t see his reflection in the mirror, how come his hair is always so neatly combed?" --Steven Wright The Nature of Light From now on we will have to treat light as
More information1. Which diagram best represents the reflection of light from an irregular surface?
waves 6-2-04 Name 02-JUN-04 1. Which diagram best represents the reflection of light from an irregular surface? 1. 1 3. 3 2. 2 4. 4 2. In a vacuum, a monochromatic beam of light as a frequency of 6.3 X
More informationPhysics 1C. Lecture 22A. "There are two ways of spreading light: to be the candle or the mirror that reflects it." --Edith Wharton
Physics 1C Lecture 22A "There are two ways of spreading light: to be the candle or the mirror that reflects it." --Edith Wharton The Nature of Light An interesting question developed as to the nature of
More informationLIGHT. Descartes particle theory, however, could not be used to explain diffraction of light.
1 LIGHT Theories of Light In the 17 th century Descartes, a French scientist, formulated two opposing theories to explain the nature of light. These two theories are the particle theory and the wave theory.
More information10/24/2012. Recall: Electromagnetic Waves do NOT require matter to transport energy
We are told to let our light shine, and if it does, we won't need to tell anybody it does. Lighthouses don't fire cannons to call attention to their shining they just shine. Dwight L. Moody American Evangelist
More informationPHY132 Introduction to Physics II Class 5 Outline:
PHY132 Introduction to Physics II Class 5 Outline: Ch. 22, sections 22.1-22.4 (Note we are skipping sections 22.5 and 22.6 in this course) Light and Optics Double-Slit Interference The Diffraction Grating
More information2/26/2016. Chapter 23 Ray Optics. Chapter 23 Preview. Chapter 23 Preview
Chapter 23 Ray Optics Chapter Goal: To understand and apply the ray model of light. Slide 23-2 Chapter 23 Preview Slide 23-3 Chapter 23 Preview Slide 23-4 1 Chapter 23 Preview Slide 23-5 Chapter 23 Preview
More informationPY106 Class31. Index of refraction. Refraction. Index of refraction. Sample values of n. Rays and wavefronts. index of refraction: n v.
Refraction Index of refraction When an EM wave travels in a vacuum, its speed is: c = 3.00 x 10 8 m/s. In any other medium, light generally travels at a slower speed. The speed of light v in a material
More informationHot Sync. Materials Needed Today
Chapter 11 Lesson 2 Materials Needed Today Please take these materials out of your backpack. Pencil Blank sheet of paper for a lab! Hot Sync Thursday 3/27/14 After learning how light acts. Write a new
More informationUNIT C: LIGHT AND OPTICAL SYSTEMS
1 UNIT C: LIGHT AND OPTICAL SYSTEMS Science 8 2 LIGHT BEHAVES IN PREDICTABLE WAYS. Section 2.0 1 3 LIGHT TRAVELS IN RAYS AND INTERACTS WITH MATERIALS Topic 2.1 RAY DIAGRAMS Scientists use ray diagrams
More informationLight Introduction. Read this article for more background information:
Light Introduction Read this article for more background information: Color Absorption Article Watch the following video on terms like Absorption, Reflection, and Transmission Video 1 Waves 1 Stephanie
More informationAt the interface between two materials, where light can be reflected or refracted. Within a material, where the light can be scattered or absorbed.
At the interface between two materials, where light can be reflected or refracted. Within a material, where the light can be scattered or absorbed. The eye sees by focusing a diverging bundle of rays from
More informationInterference & Diffraction
Electromagnetism & Light Interference & Diffraction https://youtu.be/iuv6hy6zsd0?t=2m17s Your opinion is very important to us. What study material would you recommend for future classes of Phys140/141?
More informationCAUTION: Direct eye exposure to lasers can damage your sight. Do not shine laser pointers near anyone s face, or look directly into the beam.
Name: Date: Partners: Purpose: To understand the basic properties of light and how it interacts with matter to reflect, refract, disperse or diffract. Part 1A: Reflection Materials: 1. mirror 2. ruler
More informationTextbook Assignment #1: DUE Friday 5/9/2014 Read: PP Do Review Questions Pg 388 # 1-20
Page 1 of 38 Page 2 of 38 Unit Packet Contents Unit Objectives Notes 1: Waves Introduction Guided Practice: Waves Introduction (CD pp 89-90) Independent Practice: Speed of Waves Notes 2: Interference and
More informationLecture 7 Notes: 07 / 11. Reflection and refraction
Lecture 7 Notes: 07 / 11 Reflection and refraction When an electromagnetic wave, such as light, encounters the surface of a medium, some of it is reflected off the surface, while some crosses the boundary
More informationModels of Light The wave model: The ray model: The photon model:
Models of Light The wave model: under many circumstances, light exhibits the same behavior as sound or water waves. The study of light as a wave is called wave optics. The ray model: The properties of
More informationLight Energy and Matter
Light Energy and Matter UNIT 9 Student Reader E5 Student Reader v. 9 Unit 9 Page 1 2017 KnowAtom TM Front Cover: The front cover shows a photograph of a library s bookshelves that are illuminated by a
More information3. Confirm Does the law of reflection apply to rough surfaces? Explain. Diffuse Reflection
Light Key Concepts How does light reflect from smooth surfaces and rough surfaces? What happens to light when it strikes a concave mirror? Which types of mirrors can produce a virtual image? Reflection
More information2 Reflection and Mirrors
2 Reflection and Mirrors Section 2 Reflection and Mirrors Reading Preview Key Concepts What are the kinds of reflection? What types of images are produced by plane, concave, and convex mirrors? Key Terms
More informationLecture Presentation Chapter 18 Ray Optics
Lecture Presentation Chapter 18 Ray Optics Suggested Videos for Chapter 18 Prelecture Videos Mirrors and Reflection Refraction Lenses and Images Video Tutor Solutions Ray Optics Class Videos Scattering
More informationUnit 3: Optics Chapter 4
Unit 3: Optics Chapter 4 History of Light https://www.youtube.com/watch?v=j1yiapztlos History of Light Early philosophers (Pythagoras) believed light was made up of tiny particles Later scientist found
More informationUnit 3: Optics Chapter 4
Unit 3: Optics Chapter 4 History of Light https://www.youtube.com/watch?v=j1yiapztlos History of Light Early philosophers (Pythagoras) believed light was made up of tiny particles Later scientist found
More informationEM Waves Practice Problems
PSI AP Physics 2 Name 1. Sir Isaac Newton was one of the first physicists to study light. What properties of light did he explain by using the particle model? 2. Who was the first person who was credited
More informationRed Orange the reflected ray. Yellow Green and the normal. Blue Indigo line. Colours of visible reflection
distance the carrying the moves away from rest position Brightness Loudness The angle between the incident ray and the normal line Amplitude Amplitude of a light Amplitude of a sound incidence Angle between
More informationPhysical or wave optics
Physical or wave optics In the last chapter, we have been studying geometric optics u light moves in straight lines u can summarize everything by indicating direction of light using a ray u light behaves
More informationL 32 Light and Optics [3]
L 32 Light and Optics [3] Measurements of the speed of light The bending of light refraction Total internal reflection Dispersion Dispersion Rainbows Atmospheric scattering Blue sky red sunsets Light and
More informationLight and all its colours
Light and all its colours Hold a CD to the light You can see all the colours of the rainbow The CD is a non-luminous body It is reflecting white light from the sun Where do the colours come from? Truth
More informationChapter 24. Wave Optics
Chapter 24 Wave Optics Wave Optics The wave nature of light is needed to explain various phenomena Interference Diffraction Polarization The particle nature of light was the basis for ray (geometric) optics
More informationChapter 8: Physical Optics
Chapter 8: Physical Optics Whether light is a particle or a wave had puzzled physicists for centuries. In this chapter, we only analyze light as a wave using basic optical concepts such as interference
More informationLECTURE 37: Ray model of light and Snell's law
Lectures Page 1 Select LEARNING OBJECTIVES: LECTURE 37: Ray model of light and Snell's law Understand when the ray model of light is applicable. Be able to apply Snell's Law of Refraction to any system.
More informationWhat is Light? What is Electromagnetic Radiation?
What is Light? Light is a form of electromagnetic radiation that can be seen by the eye. What is Electromagnetic Radiation? Electromagnetic radiation is a term used to describe waves that are created by
More informationLesson Plan Outline for Rainbow Science
Lesson Plan Outline for Rainbow Science Lesson Title: Rainbow Science Target Grades: Middle and High School Time Required: 120 minutes Background Information for Teachers and Students Rainbows are fascinating
More informationPHYSICS. Chapter 33 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 33 Lecture RANDALL D. KNIGHT Chapter 33 Wave Optics IN THIS CHAPTER, you will learn about and apply the wave model of light. Slide
More informationLight and Electromagnetic Waves. Honors Physics
Light and Electromagnetic Waves Honors Physics Electromagnetic Waves EM waves are a result of accelerated charges and disturbances in electric and magnetic fields (Radio wave example here) As electrons
More information3/10/2019. Models of Light. Waves and wave fronts. Wave fronts and rays
Models of Light The wave model: Under many circumstances, light exhibits the same behavior as material waves. The study of light as a wave is called wave optics. The ray model: The properties of prisms,
More informationScience 8 Chapter 5 Section 1
Science 8 Chapter 5 Section 1 The Ray Model of Light (pp. 172-187) Models of Light wave model of light: a model in which light is a type of wave that travels through space and transfers energy from one
More informationMichelson Interferometer
Michelson Interferometer The Michelson interferometer uses the interference of two reflected waves The third, beamsplitting, mirror is partially reflecting ( half silvered, except it s a thin Aluminum
More information25-1 Interference from Two Sources
25-1 Interference from Two Sources In this chapter, our focus will be on the wave behavior of light, and on how two or more light waves interfere. However, the same concepts apply to sound waves, and other
More informationLight travels in straight lines, this is referred to as... this means that light does not bend...
SNC 2DI - 10.2 Properties of Light and Reflection Light travels in straight lines, this is referred to as... this means that light does not bend... Reflection : Light travels in a straight line as long
More informationChapter 24. Wave Optics
Chapter 24 Wave Optics Diffraction Huygen s principle requires that the waves spread out after they pass through slits This spreading out of light from its initial line of travel is called diffraction
More informationSingle Slit Diffraction *
OpenStax-CNX module: m42515 1 Single Slit Diffraction * OpenStax This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0 Discuss the single slit diraction
More informationConcepTest PowerPoints
ConcepTest PowerPoints Chapter 24 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for
More informationChapter 5 Mirror and Lenses
Chapter 5 Mirror and Lenses Name: 5.1 Ray Model of Light Another model for light is that it is made up of tiny particles called. Photons travel in perfect, lines from a light source This model helps us
More informationOptics: Laser Light Show Teacher Version
Optics: Laser Light Show Teacher Version In this lab, you will explore the behavior of light. You will observe reflection and refraction of a laser beam in jello, and use a diffraction pattern to measure
More informationExam Review: Geometric Optics 1. Know the meaning of the following terms and be able to apply or recognize them:
Exam Review: Geometric Optics 1. Know the meaning of the following terms and be able to apply or recognize them: physics transparent convex mirror real image optics translucent refraction virtual image
More informationDiffraction: Taking Light Apart
Diffraction: Taking Light Apart Engage Student Guide A. Waves Let s first consider diffraction. It s part of everyday life, in which waves of energy don t seem to move in straight lines. Do the activity
More informationReflection and Refraction. Chapter 29
Reflection and Refraction Chapter 29 Reflection When a wave reaches a boundary between two media, some or all of the wave bounces back into the first medium. Reflection The angle of incidence is equal
More informationInterference of Light
Lecture 22 Chapter 22 Physics II Wave Optics: Interference of Light Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Wave Motion Interference Models of Light (Water waves are Easy
More informationChapter 24 - The Wave Nature of Light
Chapter 24 - The Wave Nature of Light Summary Four Consequences of the Wave nature of Light: Diffraction Dispersion Interference Polarization Huygens principle: every point on a wavefront is a source of
More informationInterference of Light
Lecture 23 Chapter 22 Physics II Wave Optics: Interference of Light Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Lecture Capture: http://echo360.uml.edu/danylov201415/physics2spring.html
More informationf. (5.3.1) So, the higher frequency means the lower wavelength. Visible part of light spectrum covers the range of wavelengths from
Lecture 5-3 Interference and Diffraction of EM Waves During our previous lectures we have been talking about electromagnetic (EM) waves. As we know, harmonic waves of any type represent periodic process
More informationInterference of Light
Interference of Light Young s Double-Slit Experiment If light is a wave, interference effects will be seen, where one part of wavefront can interact with another part. One way to study this is to do a
More informationChapter 24. Geometric optics. Assignment No. 11, due April 27th before class: Problems 24.4, 24.11, 24.13, 24.15, 24.24
Chapter 24 Geometric optics Assignment No. 11, due April 27th before class: Problems 24.4, 24.11, 24.13, 24.15, 24.24 A Brief History of Light 1000 AD It was proposed that light consisted of tiny particles
More information4. Refraction. glass, air, Perspex and water.
Mr. C. Grima 11 1. Rays and Beams A ray of light is a narrow beam of parallel light, which can be represented by a line with an arrow on it, in diagrams. A group of rays makes up a beam of light. In laboratory
More information1.54 Law of Reflection
1.54 Law of Reflection Define reflection and image. Compare and contrast regular and diffuse reflection. State the law of reflection. 193 1.54. Law of Reflection www.ck12.org This dancer is practicing
More informationAll forms of EM waves travel at the speed of light in a vacuum = 3.00 x 10 8 m/s This speed is constant in air as well
Pre AP Physics Light & Optics Chapters 14-16 Light is an electromagnetic wave Electromagnetic waves: Oscillating electric and magnetic fields that are perpendicular to the direction the wave moves Difference
More informationLight. Form of Electromagnetic Energy Only part of Electromagnetic Spectrum that we can really see
Light Form of Electromagnetic Energy Only part of Electromagnetic Spectrum that we can really see Facts About Light The speed of light, c, is constant in a vacuum. Light can be: REFLECTED ABSORBED REFRACTED
More informationChapter 35. The Nature of Light and the Laws of Geometric Optics
Chapter 35 The Nature of Light and the Laws of Geometric Optics Introduction to Light Light is basic to almost all life on Earth. Light is a form of electromagnetic radiation. Light represents energy transfer
More informationLecture Ray Model of Light. Physics Help Q&A: tutor.leiacademy.org
Lecture 1201 Ray Model of Light Physics Help Q&A: tutor.leiacademy.org Reflection of Light A ray of light, the incident ray, travels in a medium. When it encounters a boundary with a second medium, part
More informationInterference of Light
Interference of Light Review: Principle of Superposition When two or more waves interact they interfere. Wave interference is governed by the principle of superposition. The superposition principle says
More informationElectromagnetism & Light. Interference & Diffraction
Electromagnetism & Light Interference & Diffraction Your opinion is very important to us. What study material would you recommend for future classes of Phys140/141? A. SmartPhysics alone B. SmartPhysics
More informationEM Spectrum, Reflection & Refraction Test
EM Spectrum, Reflection & Refraction Test Name: 1. For each of the diagrams below, an object is shown in position before a concave mirror. The shiny side is on the left, facing the object. For each case,
More informationChapter 25. Wave Optics
Chapter 25 Wave Optics Interference Light waves interfere with each other much like mechanical waves do All interference associated with light waves arises when the electromagnetic fields that constitute
More informationInterference of Light
Lecture 23 Chapter 22 Physics II 08.07.2015 Wave Optics: Interference of Light Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Lecture Capture: http://echo360.uml.edu/danylov201415/physics2spring.html
More information(Equation 24.1: Index of refraction) We can make sense of what happens in Figure 24.1
24-1 Refraction To understand what happens when light passes from one medium to another, we again use a model that involves rays and wave fronts, as we did with reflection. Let s begin by creating a short
More informationOffice Hours. Scattering and Polarization
Office Hours Office hours are posted on the website. Molly: Tuesdays 2-4pm Dr. Keister: Wednesdays 10am-12 Prof. Goldman: Wednesdays 2-3:30pm All office hours are in the help room downstairs If none of
More informationChapter 22. Reflection and Refraction of Light
Chapter 22 Reflection and Refraction of Light Nature of Light Light has a dual nature. Particle Wave Wave characteristics will be discussed in this chapter. Reflection Refraction These characteristics
More informationChapter 15. Light Waves
Chapter 15 Light Waves Chapter 15 is finished, but is not in camera-ready format. All diagrams are missing, but here are some excerpts from the text with omissions indicated by... After 15.1, read 15.2
More informationLight, Lenses, Mirrors
Light, Lenses, Mirrors Optics Light is Dual in nature- has both particle and wave properties. Light = range of frequencies of electromagnetic waves that stimulates the eye s retina Facts About Light It
More informationImage Formation by Refraction
Image Formation by Refraction If you see a fish that appears to be swimming close to the front window of the aquarium, but then look through the side of the aquarium, you ll find that the fish is actually
More informationWhat is it? How does it work? How do we use it?
What is it? How does it work? How do we use it? Dual Nature http://www.youtube.com/watch?v=dfpeprq7ogc o Electromagnetic Waves display wave behavior o Created by oscillating electric and magnetic fields
More informationCollege Physics B - PHY2054C
Young College - PHY2054C Wave Optics: 10/29/2014 My Office Hours: Tuesday 10:00 AM - Noon 206 Keen Building Outline Young 1 2 3 Young 4 5 Assume a thin soap film rests on a flat glass surface. Young Young
More informationLight & Optical Systems Reflection & Refraction. Notes
Light & Optical Systems Reflection & Refraction Notes What is light? Light is electromagnetic radiation Ultra-violet + visible + infra-red Behavior of Light Light behaves in 2 ways particles (photons)
More informationNew topic: Diffraction only one slit, but wide. From Last time. Huygen s principle. Overlapping diffraction patterns. Diffraction from other objects
New topic: Diffraction only one slit, but wide From Last time Two-source interference: Interference-like pattern from a single slit. For a slit: a θ central width ~ 2 Diffraction grating Week3HW on Mastering
More informationPhysics 132: Lecture Fundamentals of Physics II Agenda for Today
Physics 132: Lecture Fundamentals of Physics II Agenda for Today Reflection of light Law of reflection Refraction of light Snell s law Dispersion PHY132 Lecture 17, Pg1 Electromagnetic waves A changing
More informationLecture Wave Optics. Physics Help Q&A: tutor.leiacademy.org
Lecture 1202 Wave Optics Physics Help Q&A: tutor.leiacademy.org Total Internal Reflection A phenomenon called total internal reflectioncan occur when light is directed from a medium having a given index
More informationPhysics 1502: Lecture 28 Today s Agenda
Physics 1502: Lecture 28 Today s Agenda Announcements: Midterm 2: Monday Nov. 16 Homework 08: due next Friday Optics Waves, Wavefronts, and Rays Reflection Index of Refraction 1 Waves, Wavefronts, and
More informationLecture PowerPoints. Chapter 24 Physics: Principles with Applications, 7 th edition Giancoli
Lecture PowerPoints Chapter 24 Physics: Principles with Applications, 7 th edition Giancoli This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching
More informationTextbook Reference: Glencoe Physics: Chapters 16-18
Honors Physics-121B Geometric Optics Introduction: A great deal of evidence suggests that light travels in straight lines. A source of light like the sun casts distinct shadows. We can hear sound from
More informationTextbook Reference: Physics (Wilson, Buffa, Lou): Chapter 24
AP Physics-B Physical Optics Introduction: We have seen that the reflection and refraction of light can be understood in terms of both rays and wave fronts of light. Light rays are quite compatible with
More informationPHY 112: Light, Color and Vision. Lecture 11. Prof. Clark McGrew Physics D 134. Review for Exam. Lecture 11 PHY 112 Lecture 1
PHY 112: Light, Color and Vision Lecture 11 Prof. Clark McGrew Physics D 134 Review for Exam Lecture 11 PHY 112 Lecture 1 From Last Time Lenses Ray tracing a Convex Lens Announcements The midterm is Thursday
More information