Name: ___________________________________ Period: _____ Date: __________________________
Light Practice Test
1.
Put a check mark by all of the statements that describe electromagnetic waves.
_______ need a medium to travel through
_______ can travel through a vacuum
_______ all travel at the same speed in a vacuum
_______ all have the same wavelength
_______ all have the same frequency
_______ all have the same amount of energy
2.
The two most commonly used models describe light as a ________________ AND as a
_________________. Therefore light has a _________________ nature.
3.
Albert Einstein hypothesized that light is composed of tiny, particle-like bundles
of radiation called _____________________.
Use the diagram below of a ray of light striking a mirror to answer the following questions.
A
C
B
E
F
D
G
4. _______ Which letter represents the angle of incidence?
5. _______ Which letter represents the angle of reflection?
6. _______ Which letter represents the mirror?
7. _______ Which letter represents the normal line?
8. _______ Which letter represents the incident ray?
9. _______ Which letter represents the reflected ray?
H
Multiple Choice - Place the letter of the best answer in the blank to the left.
10. _______ The wavelength of an electromagnetic wave is _____.
A. directly proportional to its frequency.
B. inversely proportional to its velocity.
C. inversely proportional to its frequency.
D. none of the above.
11. _______ Compared to the photons of violet light, the photons of red light ___.
A. have more energy.
B. have less energy.
C. have equal energy.
D. none of the above.
12. _______ Compared to radio waves, infrared waves have _____.
A. shorter wavelengths.
B. photons with more energy.
C. higher frequencies.
D. all of the above.
13. _______ Compared to gamma rays, X-rays have _____.
A. longer wavelengths.
B. higher frequencies.
C. photons with more energy.
D. all of the above.
14. _______ We perceive infrared waves as _____.
A. coldness.
B. light.
C. warmth.
D. none of the above.
15. _______ Which of the following is fundamentally different from the others?
A. light waves
B. sound waves
C. X-rays
D. gamma rays
E. radio waves
16. _______ Light demonstrates particle characteristics when it
A. knocks electrons off a metal surface.
B. passes through a narrow opening.
C. forms standing waves.
D. All of the above
17. _______ As the frequency of light waves increases,
A. the energy increases.
B. the energy decreases.
C. the energy stays the same.
D. The wavelength increases.
18. _______ Light rays reflecting off a smooth surface reflect
A. in the same direction.
B. in the opposite direction.
C. in all angles.
D. None of the above.
19. _______ The law of reflection says the angle of incidence is ______ the angle of
reflection.
A. greater than
B. less than
C. equal to
D. None of the above
20. _______ Reflection of light in random angles is called
A. diffuse reflection.
B. the law of reflection.
C. regular reflection.
D. the angle of reflection.
21. _______ When light moves from a material in which its speed is higher to one in which
its speed is lower, the ray is
A. bent away from the normal.
B. bent toward the normal.
C. converged.
D. diverged.
22. _______ Intensity of light depends on the
A. rate of energy flow.
B. Distance from the source.
C. Both (a) and (b)
D. Neither (a) nor (b)
23. _______ When you see a pencil in your classroom, in which of the following ways is
light involved?
A. Light sent out from your eyes hits the pencil and bounces back into
your eyes.
B. Light is "made" in the pencil and this light is sent out by the pencil
and some of it reaches your eyes.
C. Some of the sunlight which enters the room bounces off (is reflected
by) the pencil and reaches your eyes.
D. Light sent out by your eyes is intercepted and absorbed by the pencil.
Match the type of electromagnetic radiation with the phrase that describes it.
24. _______ Radio Waves
A. kill cancerous cells
25. _______ Infrared Waves
B. can cause sunburn
26. _______ Visible Light
C. home security systems
27. _______ Ultraviolet Rays
D. scanning luggage in an airport
28. _______ X-Rays
E. cell phones
29. _______ Gamma Rays
F. cooking
30. _______ Microwaves
G. photosynthesis
31. Write the 7 parts of the electromagnetic spectrum below in order from longest
wavelength to shortest wavelength.
Longest Wavelength
Shortest Wavelength
32. On the front of an ambulance you usually see the following written:
What is the reason for this?
Name: ___________________________________ Period: _____ Date: __________________________
Light Practice Test
1.
Put a check mark by all of the statements that describe electromagnetic waves.
_______ need a medium to travel through
______ can travel through a vacuum
______ all travel at the same speed in a vacuum
_______ all have the same wavelength
_______ all have the same frequency
_______ all have the same amount of energy
2.
The two most commonly used models describe light as a __wave__ AND as a
___particle___. Therefore light has a __dual__ nature.
3.
Albert Einstein hypothesized that light is composed of tiny, particle-like bundles
of radiation called __photons____.
Use the diagram below of a ray of light striking a mirror to answer the following questions.
A
C
B
E
F
D
G
4. ___E___ Which letter represents the angle of incidence?
5. ___F___ Which letter represents the angle of reflection?
6. ___H___ Which letter represents the mirror?
7. ___A___ Which letter represents the normal line?
8. ___C___ Which letter represents the incident ray?
9. ___B___ Which letter represents the reflected ray?
H
Multiple Choice - Place the letter of the best answer in the blank to the left.
10. ___C___ The wavelength of an electromagnetic wave is _____.
A. directly proportional to its frequency.
B. inversely proportional to its velocity.
C. inversely proportional to its frequency.
D. none of the above.
11. ___B___ Compared to the photons of violet light, the photons of red light ___.
A. have more energy.
B. have less energy.
C. have equal energy.
D. none of the above.
12. ___D___ Compared to radio waves, infrared waves have _____.
A. shorter wavelengths.
B. photons with more energy.
C. higher frequencies.
D. all of the above.
13. __A____ Compared to gamma rays, X-rays have _____.
A. longer wavelengths.
B. higher frequencies.
C. photons with more energy.
D. all of the above.
14. ___C___ We perceive infrared waves as _____.
A. coldness.
B. light.
C. warmth.
D. none of the above.
15. ___B___ Which of the following is fundamentally different from the others?
A. light waves
B. sound waves
C. X-rays
D. gamma rays
E. radio waves
16. ___A___ Light demonstrates particle characteristics when it
A. knocks electrons off a metal surface.
B. passes through a narrow opening.
C. forms standing waves.
D. All of the above
17. ___A___ As the frequency of light waves increases,
A. the energy increases.
B. the energy decreases.
C. the energy stays the same.
D. The wavelength increases.
18. ___B___ Light rays reflecting off a smooth surface reflect
A. in the same direction.
B. in the opposite direction.
C. in all angles.
D. None of the above.
19. ___C___ The law of reflection says the angle of incidence is ______ the angle of
reflection.
A. greater than
B. less than
C. equal to
D. None of the above
20. ___A___ When light moves from a material in which its speed is higher to one in which
its speed is lower, the ray is
A. refracted.
B. reflected.
C. converged.
D. diverged.
21. ___C___ When you see a pencil in your classroom, in which of the following ways is
light involved?
A. Light sent out from your eyes hits the pencil and bounces back into
your eyes.
B. Light is "made" in the pencil and this light is sent out by the pencil
and some of it reaches your eyes.
C. Some of the sunlight which enters the room bounces off (is reflected
by) the pencil and reaches your eyes.
D. Light sent out by your eyes is intercepted and absorbed by the pencil.
Match the type of electromagnetic radiation with the phrase that describes it.
22. ___E___ Radio Waves
A. kill cancerous cells
23. ___C___ Infrared Waves
B. can cause sunburn
24. ___G___ Visible Light
C. home security systems
25. ___B___ Ultraviolet Rays
D. scanning luggage in an airport
26. ___D___ X-Rays
E. cell phones
27. ___A___ Gamma Rays
F. cooking
28. ___F___ Microwaves
G. photosynthesis
29. Write the 7 parts of the electromagnetic spectrum below in order from longest
wavelength to shortest wavelength.
Longest Wavelength
Radio/TV
microwaves
Shortest Wavelength
infrared waves
Ultraviolet
Visible
X-Rays
30. On the front of an ambulance you usually see the following written:
What is the reason for this?
When it reflects in your rear-view mirror it will look “normal.”

Gamma