Review – Light
1. What particle causes photons to be emitted from atoms?
2. How does a photon of red light compare to a photon of blue light?
3. What is refraction?
4. What is specular reflection? What is diffuse reflection? What kinds of surfaces
cause each?
5. If an incident ray strikes a reflective surface at an angle of 30◦ to the normal,
what will be the angle of reflection?
6. How does the photoelectric effect explain that violet light can cause electrons to
be ejected from metals, but red light cannot?
7. What did Young’s double slit experiment show?
8. Are light waves mechanical, or electromagnetic? Are they transverse, or
longitudinal?
9. Give an example of a luminous body, and an example of an illuminated body.
What is the difference between the two types of objects, in regards to how they
interact with light?
10. Where will the image of the circle be located in the image
at right?
11. Which part of the EM spectrum gives you a sunburn?
12. For a student to see her full image from head to toe in a flat
mirror, what must the minimum length of that mirror be?
13. Which part of the EM spectrum has the lowest frequency?
Which has the longest wavelength?
14. How much of the EM spectrum is made up of visible light?
15. Are images in plane mirrors real, or virtual? How do you know?
16. When light goes from air into water, the light will bend _________ the normal,
because the light will _________. (extension for K-only: which has greater
optical density? Which has a higher index of refraction?)
17. What is the difference between diffraction, and refraction?
18. What is the frequency of infrared light with a wavelength of 0.0003 meter (3.0 x
10-4 meter)? (Use a speed of light of 3.0 x 108 m/s)
19. When light passes from air into water, the frequency of the light remains the
same. What happens to the speed and the wavelength of light as it crosses the
boundary going from air into water?
20. Which of the people below (represented
by eyes) would be able to see the image of
DJ
Jo
the light bulb in the mirror?
21. In the image at right, is medium 1 faster or slower than medium 2?
Ty
22. The frequency of an FM radio station is 100,700,000 hertz. What
is the wavelength of this radio signal? (Use a speed of light of 3.0 x
108 m/s)
The remaining question are for K level only.
23. What are two ways that you could determine from a set of materials, which has
the greatest optical density?
24. Use the diagram below to record the five cases for lenses.
F
2F
Identify images as real/virtual, erect/inverted, and
reduced/enlarged.
2F
F
F
2F
2F
F
F
2F
2F
F
F
2F
2F
F
F
2F
F
2F
Review – Light
1. What particle causes photons to be emitted from atoms?
2. How does a photon of red light compare to a photon of blue light?
3. What is refraction?
4. What is specular reflection? What is diffuse reflection? What kinds of surfaces
cause each?
5. If an incident ray strikes a reflective surface at an angle of 30◦ to the normal,
what will be the angle of reflection?
6. How does the photoelectric effect explain that violet light can cause electrons to
be ejected from metals, but red light cannot?
7. What did Young’s double slit experiment show?
8. Are light waves mechanical, or electromagnetic? Are they transverse, or
longitudinal?
9. Give an example of a luminous body, and an example of an illuminated body.
What is the difference between the two types of objects, in regards to how they
interact with light?
10. Where will the image of the circle be located in the image
at right?
11. Which part of the EM spectrum gives you a sunburn?
12. For a student to see her full image from head to toe in a flat
mirror, what must the minimum length of that mirror be?
13. Which part of the EM spectrum has the lowest frequency?
Which has the longest wavelength?
14. How much of the EM spectrum is made up of visible light?
15. Are images in plane mirrors real, or virtual? How do you know?
16. When light goes from air into water, the light will bend _________ the normal,
because the light will _________. (extension for K-only: which has greater
optical density? Which has a higher index of refraction?)
17. What is the difference between diffraction, and refraction?
18. What is the frequency of infrared light with a wavelength of 0.0003 meter (3.0 x
10-4 meter)? (Use a speed of light of 3.0 x 108 m/s)
19. When light passes from air into water, the frequency of the light remains the
same. What happens to the speed and the wavelength of light as it crosses the
boundary going from air into water?
20. Which of the people below (represented
by eyes) would be able to see the image of
DJ
Jo
the light bulb in the mirror?
21. In the image at right, is medium 1 faster or slower than medium 2?
Ty
22. The frequency of an FM radio station is 100,700,000 hertz. What
is the wavelength of this radio signal? (Use a speed of light of 3.0 x
108 m/s)
The remaining question are for K level only.
23. What are two ways that you could determine from a set of materials, which has
the greatest optical density?
24. Use the diagram below to record the five cases for lenses.
F
2F
Identify images as real/virtual, erect/inverted, and
reduced/enlarged.
2F
F
F
2F
2F
F
F
2F
2F
F
F
2F
2F
F
F
2F
F
2F