Physical Science Final Review

95. The amount of light reflected from the front surface of a common windowpane is about

A) 4 percent.

33. Which of the following cannot travel in a vacuum?

A) a light wave B) a sound wave C) a radio wave D) All can travel in a vacuum. E) None can travel in a vacuum. B) a sound wave

45. At the same time an astronaut on the moon sees a solar eclipse, observers on Earth see

A) a lunar eclipse.

19. Materials generally become warmer when light is

A) absorbed by them.

47. When the frequency of light matches the natural frequency of molecules in a material, light is

A) absorbed.

59. Colors seen on TV results from color

A) addition.

55. If three primary colors of light are to shine on a white wall to produce a white spot, the primaries must be

A) additive.

113. As a light ray enters or exits a water-air interface at an angle of 15 degrees with the normal, it

A) always bends toward the normal.

14. When visible light is incident upon clear glass, atoms in the glass

A) are forced into vibration.

83. Distant dark colored hills appear blue because that is the color of the

A) atmosphere between the observer and the hills.

89. On a planet where atmospheric gases are yellow, distant snow covered hills would look

A) bluish.

91. Light is emitted when

A) electron clouds of atoms are forced into oscillation.

100. The shortest plane mirror in which you can see your entire image is

A) half your height.

46. Color depends on what characteristic of light?

A) its frequency

93. The incident light ray, the reflected light ray, and the normal between them

A) lie in the same plane.

116. Atmospheric refraction makes the daylight hours a bit

A) longer.

82. If sunlight were green instead of white, the most comfortable color to wear on a cold day would be

A) magenta.

37. Glass is opaque to wave frequencies that

A) match its natural frequencies.

75. The whiteness of clouds is evidence in the clouds for a variety of

A) particle sizes.

97. A surface that is considered rough for infrared waves may be polished for

A) radio waves.

58. Magenta light is really a mixture of

A) red and blue light.

86. If the atmosphere were about 40 times thicker, at noon the sun would appear

A) red-orange.

90. The redness of the lunar eclipse is evidence for the

A) refraction of sunsets and sunrises all around the world.

70. Sunsets are red, blue jays are blue; the reason's the same:

A) scattered sunlight - nothing new.

11. Which of the following is fundamentally different from the others?

A) sound waves B) X-rays C) gamma rays D) light waves E) radio waves A) sound waves

38. A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses would be the

A) sunglasses.

20. Sunburns are produced by

A) ultraviolet light.

101. To see his full height, a boy that is 1 meter tall needs a mirror that is at least

B) 0.50 m tall.

42. What is the frequency of an electromagnetic wave that has a wavelength of 300,000 km?

B) 1 Hz

103. A diver shines light up to the surface of a smooth pond at a 10-degree angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of

B) 10 degrees.

104. A yellow-white candle flame reflected from a piece of red glass shows two images; one from each surface.

B) One image is yellow-white and the other red

36. Glass is transparent to wave frequencies that

B) are below its natural frequencies.

94. Object and image for a plane mirror lie

B) equal distances from the mirror.

53. Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the

B) green glass.

64. A mixture of cyan and yellow pigments appears

B) green.

44. Things seen by moonlight usually aren't colored because moonlight

B) is too dim to activate the retina's cones.

96. Diffuse reflection occurs when the size of surface irregularities is

B) large compared to the wavelength of the light used.

17. Compared to its average speed in air, the average speed of a beam of light in glass is

B) less.

73. The sun is more likely to appear red at sunset than in the middle of the day as a result of the

B) longer path of air through which sunlight travels.

7. Compared to ultraviolet waves, the wavelength of infrared waves is

B) longer.

39. The moon would be at its fullest just before the time of a

B) lunar eclipse

22. A lunar eclipse occurs when the

B) moon passes into Earth's shadow.

2. Electromagnetic waves consist of

B) oscillating electric and magnetic fields.

24. A partial solar eclipse occurs for people in the sun's

B) penumbra

54. The colored dots that make up the color on a TV screen are

B) red, blue, green.

13. When ultraviolet light is incident upon glass, atoms in the glass

B) resonate.

66. Which interacts more with sounds of relatively high frequencies?

B) small bells

67. Which interacts more with light of relatively high frequencies?

B) small particles

60. Colors seen on the cover of our physics book result from color

B) subtraction.

16. The speed of light in the void between molecules in glass is

B) the same as its speed in a vacuum.

92. Light will almost always travel from one place to another along a path of least

B) time.

21. The Earth's atmosphere is transparent to most waves in the

B) visible part of the spectrum.

111. Ninety-five percent of light incident on a mirror is reflected. How much light is reflected when three of these mirrors are arranged so light reflects from one after the other?

C) 86%

6. Which of these electromagnetic waves has the shortest wavelength?

C) X-rays

69. A whitish sky is evidence that the atmosphere contains

C) a mixture of particle sizes.

51. The solar radiation curve is

C) a plot of brightness of sunlight versus its frequency.

115. Light travels fastest in

C) a vacuum.

4. The source of all electromagnetic waves is

C) accelerating electric charges.

74. A variety of sunset colors is evidence for a variety of

C) atmospheric particles.

49. What color light is transmitted by a piece of blue glass?

C) blue

32. If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the

C) both would reach Earth at the same time.

107. Standing at the shore of a still lake, the reflected view of scenery on the far side of the lake is the view you would see if you were upside down with your eye in the line of sight

C) directly beneath you, as far below water level as you are above.

5. If the sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes

C) for light to travel from the sun to the Earth.

109. The inversion of your image in a plane mirror is actually an inversion of

C) front-back.

81. If sunlight were green instead of white, the most comfortable color to wear on a hot day would be

C) green.

18. Infrared waves are often called heat waves because they

C) induce resonance in molecules and increase internal energy in a substance.

71. The sky is the deepest blue

C) just after a rainstorm.

41. What is the wavelength of an electromagnetic wave that has a frequency of 3 kilohertz?

C) more than 1 km

40. What is the wavelength of an electromagnetic wave that has a frequency of 1 hertz?

C) more than 1 m

84. Distant snow covered hills appear yellowish because that is the color of the

C) reflected light that survives scattering.

48. The color of an opaque object is the same as the light that is

C) reflected.

23. A solar eclipse occurs when the

C) the moon's shadow touches Earth.

8. Compared to radio waves, the velocity of visible light waves in a vacuum is

C) the same

105. When you look at yourself in a pocket mirror, and then hold the mirror farther away, you see

C) the same amount of yourself.

114. When light passes through an ordinary window pane, its angle of emergence is

C) the same as its angle of incidence.

15. Consider light energy that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is

C) the same.

61. How many colors of ink are used to print full-color pictures?

C) three plus black

99. If you walk towards a mirror at a certain speed, the relative speed between you and your image is

C) twice your speed.

12. The natural frequency of the atoms in glass is in the

C) ultraviolet part of the spectrum.

80. A blue object will appear black when illuminated with

C) yellow light.

50. The brightest color emitted by the sun is

C) yellow-green.

102. You wish to photograph the image of your little sister, who is standing 2 meters from a plane mirror. Holding the camera beside her head, you should set the distance for

D) 4 meters.

9. If an electric charge is shaken up and down

D) a magnetic field is created

25. While Earth is experiencing a total solar eclipse, an observer on the side of the moon facing the Earth would see

D) a tiny dark spot move across the face of Earth.

76. The greenish blue of water is evidence for the

D) absorption of red light.

85. If molecules in the sky scattered orange light instead of blue light, sunsets would be colored

D) blue.

79. A sheet of red paper will look black when illuminated with

D) cyan light.

57. The complementary color of blue is

D) cyan.

3. The fact that light travels at 300,000 km/s is a consequence of

D) energy conservation.

62. Different colors of light correspond to different light

D) frequencies.

10. If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a

D) frequency of 1000 Hz.

1. Most of the waves in the electromagnetic spectrum are

D) invisible.

65. Look at a full-color picture in a magazine with a magnifying glass and you'll see that the inks used are

D) magenta, cyan, yellow, and black.

56. Complementary colors are two colors that

D) produce white light when added together.

88. On a planet where atmospheric gases are red, distant dark colored hills would look

D) reddish.

72. Red sunsets are due to lower frequencies of light that

D) survive being scattered in the air.

106. It is difficult to see the roadway in front of you when you are driving on a rainy night mainly because

D) the film of water on the roadway makes the road less diffuse.

63. A mixture of red and green pigments appears

E) blackish brown.

34. The main difference between a radio wave and a sound wave is their different

E) modes of travel.

98. When light reflects from a surface, there is a change in its

E) none of these