MDHS Science Department SPH 4U - Student Goal Tracking Sheet

Transcription

1 Name: Unit name: Wave Nature of light Goals for this unit: MDHS Science Department SPH 4U - Student Goal Tracking Sheet 1) I can explain wave behaviour and apply the properties to the Wave Theory of Light. 2) I can explain and determine refraction, polarization and thin film interference. 3) I can explain and determine interference patterns caused by single slit, double slit and gratings. Self-Assessment Self-Reflection Today s Topic Today s Goal Did I watch the assigned video for this topic? Did I complete the homework for this topic? Did I complete the Journal for this topic? How successful was I with this Journal? (1 (need review) to 4 (mastered)) Did I review this for the unit test? Did I review this for the exam? SPH 4U - Investigation of Wave Behaviour I can explain wave behaviour with; barriers, different mediums, etc... and explain how they relate to real world applications. Corpuscular Theory vs. Wave Theory I can explain and identify where past physicists debated over the wave nature of light. Wave Theory I can explain how wave theory is extended to the concept of the nature of light. Refraction in Light I can explain how refraction applies to light and extend it to Young's Double Slit experiment. Polarization I can explain the concept of polarization and apply it to real world applications, including appropriate calculations.

2 Self-Assessment Self-Reflection Today s Topic Today s Goal Did I watch the assigned video for this topic? Did I complete the homework for this topic? Did I complete the Journal for this topic? How successful was I with this Journal? (1 (need review) to 4 (mastered)) Did I review this for the unit test? Did I review this for the exam? Thin Film Interference I can explain the concept of thin film interference and apply it to real world applications, including the appropriate calculations. Interference in an Air Wedge and Single Slit Interference I can determine the interference patterns that develop from an air wedge and single slit screen. Diffraction Gratings I can determine the pattern that develops with diffraction gratings and apply them to real world situations. Pre-test reflection (How am I going to do? What am I good at? What do I need to study or improve?)

3 U4L1 Review of Wave Behaviour 1. Touching your finger to the surface of water is similar to a point source for a wave generator. If the dot below represents a point source, draw the resulting waves and indicate their direction. 2. Continually rocking the wooden dowel (stick) back and forth acted as a continuous plane source generator. Sketch the resulting waves for the following frequencies so that a comparison between the two frequencies can be made. Low Frequency High Frequency 3. If a plane source generator sends a single wave towards a barrier, sketch the result (What happens to the wave when it strikes the barrier?). Before After Wave Barrier Barrier 4. If a plane source generator sends continuous waves towards a barrier, sketch the result (What happens to the waves when it strikes the barrier?). Before After

4 5. If a plane source generator sends continuous waves towards a shallow end, sketch the result (What happens to the waves when they pass over the shallow section?). Shallow Area 6. If a plane source generator sends continuous waves towards a barrier as shown, sketch the results (What happens to the waves when reach and pass the barrier?). Low Frequency High Frequency Barrier Barrier 7. If a plane source generator sends continuous waves towards a barrier placed again the tank wall as shown, sketch the result (What happens to the waves when reach and pass the barrier?).

5 8. If a plane source generator sends continuous waves towards a barrier with a gap as shown, sketch the result (What happens to the waves when reach and pass the gap in the barrier?). 9. Explain how an echo works. Provide a diagram to help with your explanation. 10. When Mr. Agar is in the classroom you can hear him and see him. When he stands outside in the hall where you cannot see him you can still hear him. Explain why.

6 11. Some coastal cities build breakwaters (barriers off the edge of the beach) to protect their beaches. Below is an aerial view of a breakwater with incoming waves for the ocean. Predict the wave pattern on the beach side of the breakwater and theorize what the benefit of the breakwater is. Beach Waves Breakwater 12. Mr. Agar designed the concert hall below. One night the MDHS jazz band performed, however, none of the microphones for the theatre worked. The band had to depend on their own power so that everyone could hear. If the top view of the theatre is provided, indicate which seats you would NOT want to sit in and explain why. Orchestra pit Band Stage Audience seating After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:

7 U4L2 Corpuscular Theory vs. Wave Theory From; rectilinear propagation, diffraction, reflection, refraction, partial reflection/refraction, dispersion and medium, pick any 4 and compare the theories. Corpuscular Theory Wave Theory Corpuscular Theory Wave Theory

8 Corpuscular Theory Wave Theory Corpuscular Theory Wave Theory After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:

9 U4L3 Wave Theory 1. Compare transverse and longitudinal waves. 2. List the 5 properties of electromagnetic wave theory. 3. Compare amplitude modulation (am) and frequency modulation (fm). Explain why frequency modulation is preferred over amplitude modulation for radio.

10 4. Sketch an example of; parallel, diverging and converging rays. 5. Compare incident and reflected rays. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #17

11 U4L4 Refraction in Light 1. Explain the concept of refraction. 2. Light travels at 3 x 10 8 m/s. Laser light with a wavelength of 520 nm enters a sheet of plastic. The index of refraction for the plastic is Answer the following: a. Determine the speed of the laser light in plastic. b. Determine the wavelength of the laser light in the plastic. c. Determine the frequency of the laser light in the plastic. d. Determine the angle or refraction if the incident beam strikes the plastic at an angle of 35 degrees. 3. Explain the concept of Young s Double Slit experiment.

12 4. A double-slit experiment is carried out with slit spacing d = 0.41 mm. The screen is at a distance of 1.5 m. The bright fringes at the centre of the screen are separated by a distance of 1.5 mm. Determine the wavelength of the light. 5. The third-order dark fringe of light with a wavelength of 652 nm is observed when light passes through two double slits onto a screen. The slit distance is 6.3 x 10-6 m. Determine at what angle the fringe is observed. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #18

13 U4L5 Polarization 1. Compare polarized and unpolarized light. 2. Provide a sketch to show how we polarize light. 3. Light passes through two Polaroid screens. The light intensity after passing through both screens is 30% or the original intensity. Determine the angle between the two screens.

14 4. Explain Brewster s angle. 5. A flashlight is directed at the flat side of a piece of quartz with an index of refraction of The light travels through air. Determine the angle of incidence that results in perfectly polarized light. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:

15 U4L6 Thin Film Interference 1. A soap film produces constructive interference of light of wavelength 500 nm and a second film produces constructive interference of light with a wavelength of 600 nm. Determine which film is thicker. Explain your answer. 2. Determine the smallest thickness of a soap film on glass capable of producing reflective destructive interference with a wavelength of 745 nm in air. Assume that the index of refraction for soapy water is the same as that for pure water, 1.33.

16 3. Most camera lenses have anti-reflection coatings made of magnesium fluoride. The magnesium fluoride coating has an index of refraction of Determine the antireflection coating thickness needed for red light with wavelength of 610 nm. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #19

17 U4L7 Interference in an Air Wedge and Single Slit Interference 1. Two glass plates are separated on one side by a human hair. The light shining on the plates has a wavelength of 6 x 10-7 m. The light intensity is zero at the point of contact between the two plates, followed by nine alternating bright and dark fringes. Determine the thickness of the hair. 2. Helium-neon laser light, with a wavelength of x 10-7 m, passes through a single slit with a width of 43 μm onto a screen 3 m from the slit. Determine the separation of adjacent minima, other than those on either side of the central maximum.

18 3. Monochromatic light falls onto a slit 3 x 10-6 m wide. The angle between the first dark fringes on either side of the central maximum is 25 degrees. Determine the wavelength of the light. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher:

19 U4L8 Diffraction Gratings 1. One diffraction grating has lines/cm and a second grating has lines/cm. Compare the separation between adjacent maxima for these two gratings. 2. Determine the angular separation of successive maxima of the same colour when light with wavelength of 660 nm is incident on a diffraction grating with lines/cm.

20 3. A diffraction grating produces a third-order bright fringe at an angle of 22 degrees for red light with a wavelength of nm. Determine the number of lines per centimetre on the grating. After completing the task I realize that: (circle all that apply) A) I understand this topic and mastered the concept. B) I need to review my notes and course resources more (eg. Notes, website, etc ) C) I need to get extra help from a peer who understands the learning goal. D) I need to get extra help from my teacher. Comment from teacher: Reflective Assessment #20