Wave Optics. Physics 2B. If two waves exist at the same point in space at the same time, they will interfere with each other.

Size: px
Start display at page:

Download "Wave Optics. Physics 2B. If two waves exist at the same point in space at the same time, they will interfere with each other."

Transcription

1 Physics 2B Wave Optics Interference If two waves exist at the same point in space at the same time, they will interfere with each other. Interference Superposition Principle for Waves The Principle of Linear Superposition : When two or more waves are present simultaneously at the same place, the resultant disturbance is the sum of the disturbances from the individual waves. Overlapping waves do not alter the travel of the other wave. The individual waves move independently of one another. 1

2 Interference Interference of Sound Waves Constructive Interference Destructive Interference For sound waves, constructive interference occurs when the condensations of the rarefactions from two sounds waves overlap. If the condensation from one sound wave overlaps the rarefaction from another sound wave, destructive interference occurs. Interference of Light Waves Interference of Light Waves Constructive interference occurs when the difference in path length is an integer number of wavelengths. Destructive interference occurs when the difference in path length is an odd integer number of half wavelengths. 2

3 Index of Refraction Water Waves Spread Out behind a Small Opening speed of light in a vacuum c n speed of light in the material v Slide Slide 17-9 Light Waves Also Spread Out Behind a Very Narrow Slit the extent to which a wave bends around the edges of an opening is determined by the ratio of /a Slide

4 Young s Double Slit Experiment Young s Double-Slit Interference Experiment Slide Analyzing the Double-Slit Experiment Young s Double Slit Experiment r dsin m m 0,1,2,3,... m m Bright fringes of a double slit: Dark fringes of a double slit: sin m m 0,1, 2,3,... d 1 sin ( m ) m 0,1,2,3,... 2 d Slide

5 Bright and Dark Fringes in the Double-Slit Experiment Bright Fringes for a Grating Slide Slide The Fringes Become Very Narrow as the Number of Slits is Increased A Grating Splits Light into the Wavelengths That Make It Up Slide Slide

6 Gratings grating are incredibly useful (especially in astronomy) because the can be used to accurately measure the wavelength of light. Gratings Accurately measuring the wavelength of light is important because every element (H, He, C, ) can only emit light of very specific wavelengths. Hydrogen From d sin( ) = m you can get the wavelength of light by measuring the angular separation ( ) of the lines: d sin( ) / m Helium Carbon Thin-Film Interference Thin-Film Interference Slide

7 Phase Changes Due to Reflection Reflections at a Boundary When a wave hits a hard boundary like a wall that is too rigid to shake, the wave will reflect back. Slide The reflected wave undergoes a phase change that is equivalent to ½ a wavelength. Reflections at a Boundary Reflections at a Boundary Hard Reflection Soft Reflection A wave reflected from a hard boundary undergoes a phase change equivalent to ½ a wavelength. 7

8 Reflections at a Boundary Analyzing Thin-Film Interference Hard Reflection Soft Reflection Slide

9 Huygen s Principle Huygen s principle: Every point on a wave front acts as a point source of tiny wavelets that move forward with the same speed as the wave; the wave front at a later instant is the surface that is tangent to the wavelets. Huygen s Principle Single-Slit Light passing through a narrow slit spreads out beyond the slit. no diffraction with diffraction Light waves from different points within a single slit travel different distances in reaching a screen. Because of this, waves from different points within the slit undergo interference and produce a diffraction pattern of bright and dark fringes. Slide

10 Even though Young s double-slit experiment in 1801 provided convincing evidence for the wave nature of light, it was very slow in being adopted. In an attempt to disprove the wave nature of light, in 1819 the French Academy of Sciences organized an essay competition on diffraction. Augustin Fresnel won the competition, but most scientists did not believe his theories. Poisson pointed out that if light truly behaved as a wave, then light waves should diffract around the edges of a sphere. If this happened, then there should be a bright spot at the center of the shadow of the sphere. The bright spot would occur because the light diffracting around the edges of the sphere should travel the same distance to the center of the shadow and produce constructive interference. The Fresnel Bright Spot The prize committee organized a test of this prediction and discovered the predicted Fresnel bright spot. 10

11 from Circular Aperture from Circular Aperture When light passes through a circular aperture such as a lens or the pupil of the eye, it undergoes diffraction and produces a diffraction pattern (interference pattern). Resolving Power 11

12 from Circular Aperture Because of diffraction, there is a limit to how close two point sources can be and still be resolved as separate. from Circular Aperture Two point sources can barely be resolved as separate if the central maximum from one diffraction pattern overlaps the first minimum from the other. barely resolved from Circular Aperture Pointillism 12

13 Pointillism Pointillism 13

Physics 272 Lecture 27 Interference (Ch ) Diffraction (Ch )

Physics 272 Lecture 27 Interference (Ch ) Diffraction (Ch ) Physics 272 Lecture 27 Interference (Ch 35.4-5) Diffraction (Ch 36.1-3) Thin Film Interference 1 2 n 0 =1 (air) t n 1 (thin film) n 2 Get two waves by reflection off of two different interfaces. Ray 2

More information

25-1 Interference from Two Sources

25-1 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 information

Models of Light The wave model: The ray model: The photon model:

Models 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 information

CHAPTER 26 INTERFERENCE AND DIFFRACTION

CHAPTER 26 INTERFERENCE AND DIFFRACTION CHAPTER 26 INTERFERENCE AND DIFFRACTION INTERFERENCE CONSTRUCTIVE DESTRUCTIVE YOUNG S EXPERIMENT THIN FILMS NEWTON S RINGS DIFFRACTION SINGLE SLIT MULTIPLE SLITS RESOLVING POWER 1 IN PHASE 180 0 OUT OF

More information

Chapter 8: Physical Optics

Chapter 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 information

Phase. E = A sin(2p f t+f) (wave in time) or E = A sin(2p x/l +f) (wave in space)

Phase. E = A sin(2p f t+f) (wave in time) or E = A sin(2p x/l +f) (wave in space) Interference When two (or more) waves arrive at a point (in space or time), they interfere, and their amplitudes may add or subtract, depending on their frequency and phase. 1 Phase E = A sin(2p f t+f)

More information

Interference of Light

Interference 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

Interference of Light

Interference 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 information

LIGHT. Descartes particle theory, however, could not be used to explain diffraction of light.

LIGHT. 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 information

Electricity & Optics

Electricity & Optics Physics 24100 Electricity & Optics Lecture 27 Chapter 33 sec. 7-8 Fall 2017 Semester Professor Koltick Clicker Question Bright light of wavelength 585 nm is incident perpendicularly on a soap film (n =

More information

Lecture 16 Diffraction Ch. 36

Lecture 16 Diffraction Ch. 36 Lecture 16 Diffraction Ch. 36 Topics Newtons Rings Diffraction and the wave theory Single slit diffraction Intensity of single slit diffraction Double slit diffraction Diffraction grating Dispersion and

More information

Chapter 36 Diffraction

Chapter 36 Diffraction Chapter 36 Diffraction In Chapter 35, we saw how light beams passing through different slits can interfere with each other and how a beam after passing through a single slit flares diffracts in Young's

More information

Chapter 24 The Wave Nature of Light

Chapter 24 The Wave Nature of Light Chapter 24 The Wave Nature of Light 24.1 Waves Versus Particles; Huygens Principle and Diffraction Huygens principle: Every point on a wave front acts as a point source; the wavefront as it develops is

More information

College Physics 150. Chapter 25 Interference and Diffraction

College Physics 150. Chapter 25 Interference and Diffraction College Physics 50 Chapter 5 Interference and Diffraction Constructive and Destructive Interference The Michelson Interferometer Thin Films Young s Double Slit Experiment Gratings Diffraction Resolution

More information

Dr. Quantum. General Physics 2 Light as a Wave 1

Dr. Quantum. General Physics 2 Light as a Wave 1 Dr. Quantum General Physics 2 Light as a Wave 1 The Nature of Light When studying geometric optics, we used a ray model to describe the behavior of light. A wave model of light is necessary to describe

More information

Chapter 36. Diffraction. Copyright 2014 John Wiley & Sons, Inc. All rights reserved.

Chapter 36. Diffraction. Copyright 2014 John Wiley & Sons, Inc. All rights reserved. Chapter 36 Diffraction Copyright 36-1 Single-Slit Diffraction Learning Objectives 36.01 Describe the diffraction of light waves by a narrow opening and an edge, and also describe the resulting interference

More information

PH 222-3A Fall Diffraction Lectures Chapter 36 (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition)

PH 222-3A Fall Diffraction Lectures Chapter 36 (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition) PH 222-3A Fall 2012 Diffraction Lectures 28-29 Chapter 36 (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition) 1 Chapter 36 Diffraction In Chapter 35, we saw how light beams passing through

More information

Interference of Light

Interference 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 information

Physical or wave optics

Physical 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 information

PHYSICS - CLUTCH CH 32: WAVE OPTICS.

PHYSICS - CLUTCH CH 32: WAVE OPTICS. !! www.clutchprep.com CONCEPT: DIFFRACTION Remember! Light travels in a straight line so long as it isn t disturbed - This allows light to be described as RAYS A common way to disturb light is to have

More information

Interference of Light

Interference 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 information

For more info

For more info Huygens Principle:- Wave-front of a wave, at any instant, is defined as the locus of all the particles in the medium which are being disturbed at the same instant of time and are in the same phase of vibration.

More information

College Physics B - PHY2054C

College 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 information

Michelson Interferometer

Michelson 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 information

Physical & Electromagnetic Optics: Basic Principles of Diffraction

Physical & Electromagnetic Optics: Basic Principles of Diffraction 24/06/2017 Physical & Electromagnetic Optics: Basic Principles of Diffraction Optical Engineering Prof. Elias N. Glytsis School of Electrical & Computer Engineering National Technical University of Athens

More information

Chapter 37. Wave Optics

Chapter 37. Wave Optics Chapter 37 Wave Optics Wave Optics Wave optics is a study concerned with phenomena that cannot be adequately explained by geometric (ray) optics. Sometimes called physical optics These phenomena include:

More information

Chapter 24. Wave Optics

Chapter 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 information

L 32 Light and Optics [3]

L 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 information

Physics 2c Lecture 25. Chapter 37 Interference & Diffraction

Physics 2c Lecture 25. Chapter 37 Interference & Diffraction Physics 2c Lecture 25 Chapter 37 Interference & Diffraction Outlook for rest of quarter Today: finish chapter 37 Tomorrow & Friday: E&M waves (Chapter 34) Next Monday, June 4 th : Quiz 8 on Chapter 37

More information

Chapter 37. Interference of Light Waves

Chapter 37. Interference of Light Waves Chapter 37 Interference of Light Waves Wave Optics Wave optics is a study concerned with phenomena that cannot be adequately explained by geometric (ray) optics These phenomena include: Interference Diffraction

More information

Diffraction. Factors that affect Diffraction

Diffraction. Factors that affect Diffraction Diffraction What is one common property the four images share? Diffraction: Factors that affect Diffraction TELJR Publications 2017 1 Young s Experiment AIM: Does light have properties of a particle? Or

More information

specular diffuse reflection.

specular 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 information

f. (5.3.1) So, the higher frequency means the lower wavelength. Visible part of light spectrum covers the range of wavelengths from

f. (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 information

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS LSN 9-3: INTERFERENCE Intro Video: Interference of Waves Questions From Reading Activity? Essential Idea: Interference patterns from multiple slits

More information

Chapter 38 Wave Optics (II)

Chapter 38 Wave Optics (II) Chapter 38 Wave Optics (II) Initiation: Young s ideas on light were daring and imaginative, but he did not provide rigorous mathematical theory and, more importantly, he is arrogant. Progress: Fresnel,

More information

Class 34. Diffraction Grating. Adding sources. Adding sources. Adding sources, II. Adding sources, II. Adding slits

Class 34. Diffraction Grating. Adding sources. Adding sources. Adding sources, II. Adding sources, II. Adding slits Class Adding sources Diffraction Grating What happens to the interference pattern when we add more sources? Let's start by switching from two sources d apart to three sources d apart. Do we still get maxima

More information

Intermediate Physics PHYS102

Intermediate 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 information

Unit-22 Interference and Diffraction

Unit-22 Interference and Diffraction Unit-22 Interference and iffraction Objective: In this experiment, we used single-slit, double-slit, circular hole and grating to measure the wavelength of laser. Apparatus: Optical track, diode laser,

More information

PHY132 Introduction to Physics II Class 5 Outline:

PHY132 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 information

UNIT 102-9: INTERFERENCE AND DIFFRACTION

UNIT 102-9: INTERFERENCE AND DIFFRACTION Name St.No. - Date(YY/MM/DD) / / Section Group # UNIT 102-9: INTERFERENCE AND DIFFRACTION Patterns created by interference of light in a thin film. OBJECTIVES 1. Understand the creation of double-slit

More information

Interference of Light

Interference 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 information

Diffraction is the bending of waves around small obstacles and the spreading out of waves past small openings

Diffraction is the bending of waves around small obstacles and the spreading out of waves past small openings Diffraction Diffraction is the bending of waves around small obstacles and the spreading out of waves past small openings Diffraction by Pinhead When λ the opening, max diffraction occurs When λ < opening

More information

Chapter 25. Wave Optics

Chapter 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 information

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS TSOKOS LESSON 9-2 SINGLE-SLIT DIFFRACTION Essential Idea: Single-slit diffraction occurs when a wave is incident upon a slit of approximately the same

More information

To see how a sharp edge or an aperture affect light. To analyze single-slit diffraction and calculate the intensity of the light

To see how a sharp edge or an aperture affect light. To analyze single-slit diffraction and calculate the intensity of the light Diffraction Goals for lecture To see how a sharp edge or an aperture affect light To analyze single-slit diffraction and calculate the intensity of the light To investigate the effect on light of many

More information

Chapter 35 &36 Physical Optics

Chapter 35 &36 Physical Optics Chapter 35 &36 Physical Optics Physical Optics Phase Difference & Coherence Thin Film Interference 2-Slit Interference Single Slit Interference Diffraction Patterns Diffraction Grating Diffraction & Resolution

More information

PHYS:1200 LECTURE 32 LIGHT AND OPTICS (4)

PHYS:1200 LECTURE 32 LIGHT AND OPTICS (4) 1 PHYS:1200 LECTURE 32 LIGHT AND OPTICS (4) The first three lectures in this unit dealt with what is for called geometric optics. Geometric optics, treats light as a collection of rays that travel in straight

More information

DIFFRACTION 4.1 DIFFRACTION Difference between Interference and Diffraction Classification Of Diffraction Phenomena

DIFFRACTION 4.1 DIFFRACTION Difference between Interference and Diffraction Classification Of Diffraction Phenomena 4.1 DIFFRACTION Suppose a light wave incident on a slit AB of sufficient width b, as shown in Figure 1. According to concept of rectilinear propagation of light the region A B on the screen should be uniformly

More information

Interference. Electric fields from two different sources at a single location add together. The same is true for magnetic fields at a single location.

Interference. Electric fields from two different sources at a single location add together. The same is true for magnetic fields at a single location. Interference Electric fields from two different sources at a single location add together. The same is true for magnetic fields at a single location. Thus, interacting electromagnetic waves also add together.

More information

PHYSICS. Chapter 33 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT

PHYSICS. 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 information

Lecture 21. Physics 1202: Lecture 22 Today s Agenda

Lecture 21. Physics 1202: Lecture 22 Today s Agenda Physics 1202: Lecture 22 Today s Agenda Announcements: Team problems today Team 16: Navia Hall, Laura Irwin, Eric Kaufman Team 18: Charles Crilly Jr, Kyle Eline, Alexandra Vail Team 19: Erica Allen, Shana

More information

5 10:00 AM 12:00 PM 1420 BPS

5 10:00 AM 12:00 PM 1420 BPS Physics 294H l Professor: Joey Huston l email:huston@msu.edu l office: BPS3230 l Homework will be with Mastering Physics (and an average of 1 hand-written problem per week) I ve assigned 22.62 as a hand-in

More information

Diffraction at a single slit and double slit Measurement of the diameter of a hair

Diffraction at a single slit and double slit Measurement of the diameter of a hair Diffraction at a single slit and double slit Measurement of the diameter of a hair AREEJ AL JARB Background... 3 Objects of the experiments 4 Principles Single slit... 4 Double slit.. 6 Setup. 7 Procedure

More information

Textbook Reference: Physics (Wilson, Buffa, Lou): Chapter 24

Textbook 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 information

Ray Optics. Lecture 23. Chapter 23. Physics II. Course website:

Ray 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 information

Topic 9: Wave phenomena - AHL 9.2 Single-slit diffraction

Topic 9: Wave phenomena - AHL 9.2 Single-slit diffraction Topic 9.2 is an extension of Topic 4.4. Both single and the double-slit diffraction were considered in 4.4. Essential idea: Single-slit diffraction occurs when a wave is incident upon a slit of approximately

More information

Chapter 24. Wave Optics

Chapter 24. Wave Optics Chapter 24 Wave Optics hitt1 An upright object is located a distance from a convex mirror that is less than the mirror's focal length. The image formed by the mirror is (1) virtual, upright, and larger

More information

Diffraction Diffraction occurs when light waves pass through an aperture Huygen's Principal: each point on wavefront acts as source of another wave

Diffraction Diffraction occurs when light waves pass through an aperture Huygen's Principal: each point on wavefront acts as source of another wave Diffraction Diffraction occurs when light waves pass through an aperture Huygen's Principal: each point on wavefront acts as source of another wave If light coming from infinity point source at infinity

More information

New 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. 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 information

EM Waves Practice Problems

EM 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 information

Chapter 24. Wave Optics

Chapter 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 information

COHERENCE AND INTERFERENCE

COHERENCE AND INTERFERENCE COHERENCE AND INTERFERENCE - An interference experiment makes use of coherent waves. The phase shift (Δφ tot ) between the two coherent waves that interfere at any point of screen (where one observes the

More information

Lab 7 Interference and diffraction

Lab 7 Interference and diffraction Prep this lab, as usual. You may paste this entire lab into your notebook, including the data tables. All this should be completed prior to the start of lab on Wednesday, and I will score your completed

More information

The sources must be coherent. This means they emit waves with a constant phase with respect to each other.

The sources must be coherent. This means they emit waves with a constant phase with respect to each other. CH. 24 Wave Optics The sources must be coherent. This means they emit waves with a constant phase with respect to each other. The waves need to have identical wavelengths. Can t be coherent without this.

More information

Ch. 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 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 information

INTERFERENCE. where, m = 0, 1, 2,... (1.2) otherwise, if it is half integral multiple of wavelength, the interference would be destructive.

INTERFERENCE. where, m = 0, 1, 2,... (1.2) otherwise, if it is half integral multiple of wavelength, the interference would be destructive. 1.1 INTERFERENCE When two (or more than two) waves of the same frequency travel almost in the same direction and have a phase difference that remains constant with time, the resultant intensity of light

More information

Announcement. Fraunhofer Diffraction. Physics Waves & Oscillations 4/17/2016. Spring 2016 Semester Matthew Jones

Announcement. Fraunhofer Diffraction. Physics Waves & Oscillations 4/17/2016. Spring 2016 Semester Matthew Jones Physics 42200 Waves & Oscillations Lecture 39 Fresnel Diffraction Spring 2016 Semester Matthew Jones Announcement Final Exam Tuesday, May 3 rd 7:00 9:00 pm Room PHYS 112 You can bring one sheet of notes,

More information

Optics Wave Behavior in Optics Diffraction

Optics Wave Behavior in Optics Diffraction Optics Wave Behavior in Optics Diffraction Lana Sheridan De Anza College June 15, 2018 Last time Interference of light: the Double-Slit experiment multiple slit interference diffraction gratings Overview

More information

Waves & Oscillations

Waves & Oscillations Physics 42200 Waves & Oscillations Lecture 37 Interference Spring 2016 Semester Matthew Jones Multiple Beam Interference In many situations, a coherent beam can interfere with itself multiple times Consider

More information

Lecture PowerPoints. Chapter 24 Physics: Principles with Applications, 7 th edition Giancoli

Lecture 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 information

Waves & Oscillations

Waves & Oscillations Physics 42200 Waves & Oscillations Lecture 39 Fresnel Diffraction Spring 2016 Semester Matthew Jones Announcement Final Exam Tuesday, May 3 rd 7:00 9:00 pm Room PHYS 112 You can bring one sheet of notes,

More information

Interference of Light

Interference of Light Interference of Light Objective To study the interference patterns of light passed through a single and double-slit, a human hair, and compact discs using a laser. Equipment meter stick index card slit

More information

Where n = 0, 1, 2, 3, 4

Where n = 0, 1, 2, 3, 4 Syllabus: Interference and diffraction introduction interference in thin film by reflection Newton s rings Fraunhofer diffraction due to single slit, double slit and diffraction grating Interference 1.

More information

Interference & Diffraction

Interference & 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 information

Wave Optics. April 9, 2014 Chapter 34 1

Wave Optics. April 9, 2014 Chapter 34 1 Wave Optics April 9, 2014 Chapter 34 1 Announcements! Remainder of this week: Wave Optics! Next week: Last of biweekly exams, then relativity! Last week: Review of entire course, no exam! Final exam Wednesday,

More information

Chapter 15. Light Waves

Chapter 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 information

Physics 1C Lecture 27A

Physics 1C Lecture 27A Physics 1C Lecture 27A "Any other situation in quantum mechanics, it turns out, can always be explained by saying, You remember the experiment with the two holes? It s the same thing. " --Richard Feynman

More information

Lecture Wave Optics. Physics Help Q&A: tutor.leiacademy.org

Lecture 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 information

University Physics (Prof. David Flory) Chapt_37 Monday, August 06, 2007

University Physics (Prof. David Flory) Chapt_37 Monday, August 06, 2007 Name: Date: 1. If we increase the wavelength of the light used to form a double-slit diffraction pattern: A) the width of the central diffraction peak increases and the number of bright fringes within

More information

Lecture 24 (Diffraction I Single-Slit Diffraction) Physics Spring 2018 Douglas Fields

Lecture 24 (Diffraction I Single-Slit Diffraction) Physics Spring 2018 Douglas Fields Lecture 24 (Diffraction I Single-Slit Diffraction) Physics 262-01 Spring 2018 Douglas Fields Single-Slit Diffraction As we have already hinted at, and seen, waves don t behave as we might have expected

More information

ConcepTest PowerPoints

ConcepTest 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 information

Physics 1C DIFFRACTION AND INTERFERENCE Rev. 2-AH. Introduction

Physics 1C DIFFRACTION AND INTERFERENCE Rev. 2-AH. Introduction Introduction The material for this chapter is discussed in Hecht, Chapter 25. Light exhibits many of the properties of a transverse wave. Waves that overlap with other waves can reinforce each other or

More information

Interference Effects. 6.2 Interference. Coherence. Coherence. Interference. Interference

Interference Effects. 6.2 Interference. Coherence. Coherence. Interference. Interference Effects 6.2 Two-Slit Thin film is a general property of waves. A condition for is that the wave source is coherent. between two waves gives characteristic patterns due to constructive and destructive.

More information

Electromagnetic waves

Electromagnetic waves Electromagnetic waves Now we re back to thinking of light as specifically being an electromagnetic wave u u u oscillating electric and magnetic fields perpendicular to each other propagating through space

More information

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS

DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS TSOKOS LESSON 4-7 DIFFRACTION Assessment Statements AHL Topic 11.3. and SL Option A-4 Diffraction: 11.3.1. Sketch the variation with angle of diffraction

More information

Chapter 38. Diffraction Patterns and Polarization

Chapter 38. Diffraction Patterns and Polarization Chapter 38 Diffraction Patterns and Polarization Diffraction Light of wavelength comparable to or larger than the width of a slit spreads out in all forward directions upon passing through the slit This

More information

Single slit diffraction

Single slit diffraction Single slit diffraction Book page 364-367 Review double slit Core Assume paths of the two rays are parallel This is a good assumption if D >>> d PD = R 2 R 1 = dsin θ since sin θ = PD d Constructive interference

More information

Physics I : Oscillations and Waves Prof. S Bharadwaj Department of Physics & Meteorology Indian Institute of Technology, Kharagpur

Physics I : Oscillations and Waves Prof. S Bharadwaj Department of Physics & Meteorology Indian Institute of Technology, Kharagpur Physics I : Oscillations and Waves Prof. S Bharadwaj Department of Physics & Meteorology Indian Institute of Technology, Kharagpur Lecture - 20 Diffraction - I We have been discussing interference, the

More information

Physics 102: Lecture 21 Thin Films & Diffraction Gratings

Physics 102: Lecture 21 Thin Films & Diffraction Gratings Physics 102: Lecture 21 Thin Films & Diffraction Gratings Physics 102: Lecture 21, Slie 1 Recall Interference (at least 2 coherent waves) Constructive (full wavelength ifference) Destructive (half wavelength

More information

Understanding Fraunhofer Diffraction

Understanding Fraunhofer Diffraction [ Assignment View ] [ Eðlisfræði 2, vor 2007 36. Diffraction Assignment is due at 2:00am on Wednesday, January 17, 2007 Credit for problems submitted late will decrease to 0% after the deadline has passed.

More information

Lecture 39. Chapter 37 Diffraction

Lecture 39. Chapter 37 Diffraction Lecture 39 Chapter 37 Diffraction Interference Review Combining waves from small number of coherent sources double-slit experiment with slit width much smaller than wavelength of the light Diffraction

More information

Waves & Oscillations

Waves & Oscillations Physics 42200 Waves & Oscillations Lecture 41 Review Spring 2016 Semester Matthew Jones Final Exam Date:Tuesday, May 3 th Time:7:00 to 9:00 pm Room: Phys 112 You can bring one double-sided pages of notes/formulas.

More information

Reflections from a thin film

Reflections from a thin film Reflections from a thin film l Part of the wave reflects from the top surface and part from the bottom surface l The part that reflects from the top surface has a 180 o phase change while the part that

More information

mywbut.com Diffraction

mywbut.com Diffraction Diffraction If an opaque obstacle (or aperture) is placed between a source of light and screen, a sufficiently distinct shadow of opaque (or an illuminated aperture) is obtained on the screen.this shows

More information

Electromagnetism & Light. Interference & Diffraction

Electromagnetism & 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 information

Physics 214 Midterm Fall 2003 Form A

Physics 214 Midterm Fall 2003 Form A 1. A ray of light is incident at the center of the flat circular surface of a hemispherical glass object as shown in the figure. The refracted ray A. emerges from the glass bent at an angle θ 2 with respect

More information

Interference and Diffraction of Light

Interference and Diffraction of Light Name Date Time to Complete h m Partner Course/ Section / Grade Interference and Diffraction of Light Reflection by mirrors and refraction by prisms and lenses can be analyzed using the simple ray model

More information

CHAPTER 24 The Wave Nature of Light

CHAPTER 24 The Wave Nature of Light CHAPTER 24 The Wave Nature of Light http://www.physicsclassroom.com/class/light/lighttoc.html Units Waves Versus Particles; Huygens Principle and Diffraction Huygens Principle and the Law of Refraction

More information

Past Paper Questions Waves

Past Paper Questions Waves Past Paper Questions Waves Name 1. Explain the differences between an undamped progressive transverse wave and a stationary transverse wave, in terms of amplitude, (ii) phase and (iii) energy transfer.

More information

Young s Double Slit Experiment

Young s Double Slit Experiment Young s Double Slit Experiment Light as a Wave? If light behaves like a wave, an experiment similar to a ripple tank using two light sources should reveal bright areas (constructive interference) and dark

More information