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optics study guide



Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 

A disturbance that transfers energy from place to place is called a
a.
wave.
b.
medium.
c.
vibration.
d.
compression.
 

2. 

Waves are created when a source of energy causes a medium to
a.
move.
b.
compress.
c.
expand.
d.
vibrate.
 

3. 

The highest parts of a wave are called
a.
troughs.
b.
crests.
c.
nodes.
d.
wavelengths.
 

4. 

Waves that move the particles of the medium parallel to the direction that the waves are traveling are called
a.
longitudinal waves.
b.
transverse waves.
c.
surface waves.
d.
combination waves.
 

5. 

The maximum distance that the particles of a medium move from the rest position is the
a.
amplitude of the wave.
b.
wavelength of the wave.
c.
frequency of the wave.
d.
speed of the wave.
 

6. 

The distance between two corresponding parts of a wave is the wave’s
a.
amplitude.
b.
wavelength.
c.
frequency.
d.
speed.
 

7. 

The speed of a wave is its wavelength multiplied by its
a.
amplitude.
b.
vibration.
c.
frequency.
d.
reflection.
 

8. 

The bending of waves due to a change in speed is called
a.
reflection.
b.
refraction.
c.
diffraction.
d.
interference.
 

9. 

The bending of waves around the edge of a barrier is known as
a.
reflection.
b.
refraction.
c.
diffraction.
d.
interference.
 

10. 

The interaction between two waves that meet is called
a.
reflection.
b.
refraction.
c.
diffraction.
d.
interference.
 

11. 

Waves combine to make a wave with larger amplitude in a process called
a.
destructive interference.
b.
constructive interference.
c.
reflection.
d.
refraction.
 

12. 

When an incoming wave combines with a reflected wave in such a way that the combined wave appears to be standing still, the result is a
a.
longitudinal wave.
b.
standing wave.
c.
transverse wave.
d.
surface wave.
 

13. 

What are the highest and lowest points on a standing wave called?
a.
nodes
b.
antinodes
c.
compressions
d.
rarefactions
 

14. 

The material through which a wave travels is called a
a.
vibration.
b.
medium.
c.
crest.
d.
trough.
 

15. 

Waves are classified according to
a.
their size.
b.
their shape.
c.
how they move.
d.
their source.
 

16. 

Waves in a pond or lake are
a.
longitudinal waves.
b.
transverse waves.
c.
surface waves.
d.
standing waves.
 

17. 

Frequency is measured in units called
a.
amps.
b.
hertz.
c.
nodes.
d.
antinodes.
 

18. 

When a wave hits a surface through which it CANNOT pass and bounces back, it undergoes
a.
reflection.
b.
refraction.
c.
constructive interference.
d.
destructive interference.
 

19. 

Waves combine to produce a smaller or zero-amplitude wave in a process called
a.
destructive interference.
b.
constructive interference.
c.
reflection.
d.
refraction.
 

20. 

Which waves have some electrical properties and some magnetic properties?
a.
longitudinal waves
b.
transverse waves
c.
mechanical waves
d.
electromagnetic waves
 

21. 

Electromagnetic waves can transfer energy without a(n)
a.
medium.
b.
electric field.
c.
magnetic field.
d.
change in either a magnetic or an electric field.
 

22. 

Light that has passed through a polarizing filter is called
a.
transverse light.
b.
polarized light.
c.
white light.
d.
photoelectric light.
 

23. 

In 1905, Albert Einstein suggested that light energy travels in tiny packets or particles called
a.
neutrons.
b.
electrons.
c.
photons.
d.
gamma rays.
 

24. 

All electromagnetic waves have the same
a.
wavelength.
b.
frequency.
c.
speed.
d.
amplitude.
 

25. 

Visible light has a higher frequency than
a.
X-rays.
b.
ultraviolet rays.
c.
infrared rays.
d.
gamma rays.
 

26. 

The range of electromagnetic waves placed in a certain order is called the
a.
electromagnetic spectrum.
b.
electromagnetic wavelength.
c.
electromagnetic frequency.
d.
electromagnetic field.
 

27. 

The electromagnetic waves with the highest frequencies are called
a.
radio waves.
b.
gamma rays.
c.
X-rays.
d.
visible light.
 

28. 

When a police officer uses radar for speed control, the officer is using what kind of electromagnetic waves?
a.
radio waves
b.
gamma rays
c.
ultraviolet rays
d.
X-rays
 

29. 

White light can be separated into the various colors of the visible spectrum to form a(n)
a.
rainbow.
b.
thermogram.
c.
MRI.
d.
X-ray picture.
 

30. 

Which type of light bulb glows when a filament inside it gets hot?
a.
incandescent
b.
fluorescent
c.
sodium vapor
d.
neon
 

31. 

Which light bulbs are coated on the inside with a powder?
a.
incandescent
b.
fluorescent
c.
neon
d.
sodium vapor
 

32. 

FM signals travel as changes in
a.
the speed of the wave.
b.
the amplitude of the wave.
c.
the frequency of the wave.
d.
the loudness of the wave.
 

33. 

What kind of waves do cellular telephones use to transmit and receive signals?
a.
gamma rays
b.
microwaves
c.
ultraviolet rays
d.
infrared rays
 

34. 

Small electronic communication devices that people carry in their pockets or attach to their clothes are called
a.
cordless telephones.
b.
pagers.
c.
televisions.
d.
satellites.
 

35. 

Broadcasting stations can send their signals around the world using
a.
cellular telephones.
b.
television satellites.
c.
pagers.
d.
the Global Positioning System.
 

36. 

Global Positioning System signals can tell you
a.
what television station you are tuned to.
b.
your exact location on Earth.
c.
how many satellites are in orbit.
d.
who is sending a message to your pager.
 

37. 

What is transferred by electromagnetic waves?
a.
sound
b.
electricity
c.
electromagnetic radiation
d.
resonance
 

38. 

Which type of light bulb is commonly used in advertising signs and decoration?
a.
incandescent
b.
fluorescent
c.
neon
d.
sodium vapor
 

39. 

Which electromagnetic waves have the longest wavelengths and lowest frequencies?
a.
infrared waves
b.
radio waves
c.
ultraviolet rays
d.
gamma rays
 

40. 

On AM broadcasts, what remains constant?
a.
the amplitude
b.
the music
c.
the frequency
d.
the speech
 

41. 

Microwaves can be used to
a.
treat cancer.
b.
make rainbows.
c.
heat food.
d.
create an X-ray image.
 

42. 

The process that uses radio waves and magnetism to produce images of tissues in the human body is called
a.
ultrasound.
b.
radar.
c.
magnetic resonance imaging.
d.
radiation treatment.
 

43. 

The images made by an infrared camera are called
a.
X-rays.
b.
thermograms.
c.
magnetic resonance images.
d.
ultraviolet images.
 

44. 

An instrument used to view different colors of light produced by each type of light bulb is called a(n)
a.
thermogram.
b.
spectroscope.
c.
radar gun.
d.
MRI machine.
 

45. 

A material that reflects or absorbs any light that strikes it is
a.
opaque.
b.
transparent.
c.
translucent.
d.
concave.
 

46. 

Frosted glass and wax paper are
a.
transparent.
b.
translucent.
c.
clear.
d.
opaque.
 

47. 

What happens when parallel rays of light hit a smooth surface?
a.
diffuse reflection
b.
diffraction
c.
refraction
d.
regular reflection
 

48. 

When the surface of a mirror curves inward, like the inside of a bowl, it is called a
a.
plane mirror.
b.
convex mirror.
c.
concave mirror.
d.
diffuse mirror.
 

49. 

The bending of light rays as they enter a new medium is called
a.
diffuse reflection.
b.
regular reflection.
c.
refraction.
d.
diffraction.
 

50. 

What happens when light passes from air into water?
a.
The light speeds up.
b.
The light continues at the same speed.
c.
The light slows down.
d.
The light forms a mirage.
 

51. 

A curved piece of glass or other transparent material that is used to refract light is called a(n)
a.
mirror.
b.
lens.
c.
reflector.
d.
optical fiber.
 

52. 

Because the light rays never meet, a concave lens can produce
a.
no image.
b.
both real and virtual images.
c.
only a real image.
d.
only a virtual image.
 

53. 

What happens when white light strikes a black object?
a.
Blue light is reflected.
b.
Red light is reflected.
c.
No light is reflected.
d.
All of the light is reflected.
 

54. 

How would a tomato look under blue light?
a.
The tomato would seem to disappear.
b.
The tomato would still appear red.
c.
The tomato would appear black.
d.
The tomato would appear white.
 

55. 

The primary colors of light are
a.
red, yellow, and blue.
b.
yellow, cyan, and magenta.
c.
red, green, and blue.
d.
red, orange, yellow, green, blue, and violet.
 

56. 

Opaque substances that are used to color other materials are called
a.
pigments.
b.
lenses.
c.
mirages.
d.
filters.
 

57. 

A laser produces light that
a.
is incoherent.
b.
has many different colors.
c.
is coherent.
d.
has many different wavelengths.
 

58. 

A laser beam can travel through a curled-up optical fiber because of
a.
diffuse reflection.
b.
holography.
c.
total internal reflection.
d.
regular reflection.
 

59. 

Clear glass, water, and air are examples of what kind of material?
a.
opaque
b.
fluid
c.
translucent
d.
transparent
 

60. 

What occurs when parallel rays of light hit a rough or bumpy surface?
a.
regular reflection
b.
diffuse reflection
c.
refraction
d.
diffraction
 

61. 

Any two primary colors of light combined in equal amounts produce
a.
a complementary color.
b.
a secondary color.
c.
a fluorescent color.
d.
the third primary color.
 

Short Answer
 
 
Use the diagram to answer each question.

optics_study_guide_files/i0640000.jpg
 

62. 

What does arrow M indicate?
 

63. 

What does arrow N indicate?
 

64. 

What does the dotted line AB represent?
 

65. 

Which numbered angle represents the angle of incidence?
 

66. 

Which numbered angle represents the angle of reflection?
 

67. 

What does the line CAD represent?
 
 
Use the diagram to answer each question.

optics_study_guide_files/i0710000.jpg
 

68. 

Name the type of wave that has the highest frequency.
 

69. 

Name the type of wave labeled C.
 

70. 

Name the type of wave that has the greatest energy.
 

71. 

Which letter shows the type of wave that can be seen by the human eye?
 

72. 

Name the type of wave labeled A.
 

73. 

Which letter indicates X-rays?
 
 
Use the diagram to answer each question.

optics_study_guide_files/i0780000.jpg
 

74. 

Which letter identifies a ground transmitter of radio waves?
 

75. 

Which letter represents a ground receiver of radio waves?
 

76. 

What is the object labeled A?
 

77. 

What does object A do when it acts a receiver?
 

78. 

What does object A do when it acts as a transmitter?
 

79. 

What prevents the radio waves from B from reaching C directly?
 
 
Use the diagram to answer each question.

optics_study_guide_files/i0850000.jpg
 

80. 

What type of mirror is shown?
 

81. 

Name and define point E.
 

82. 

What type of image does this mirror form?
 

83. 

Relate the size and orientation of the image formed by the mirror to the size and orientation of the original object.
 

84. 

What type of image will form if the candle is placed between E and D?
 

85. 

What will happen to the reflected light if the candle is placed at point E?
 
 
Use the diagram to answer each question.

optics_study_guide_files/i0920000.jpg
 

86. 

What type of lens is shown?
 

87. 

What effect does the lens have on parallel light rays passing through it?
 

88. 

On which side of the lens—left or right—would the focal point appear to be?
 

89. 

What type of image does this lens form?
 

90. 

How does the shape of the lens compare to the shape of the lens in your eye?
 



 
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