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Physical Science, 5/e
Bill Tillery, Arizona State University

Light

Essay Quiz



1

What determines if an electromagnetic wave emitted from an object is a visible light wave or a wave of infrared radiation?
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2

What model of light does the polarization of light support? Explain.
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3

Which carries more energy, red light or blue light? Should this mean anything about the preferred color of warning and stop lights? Explain.
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4

What model of light is supported by the photoelectric effect? Explain.
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5

What happens to light that is absorbed by matter?
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6

One star is reddish, and another is bluish. Do you know anything about the relative temperatures of the two stars? Explain.
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7

When does total internal reflection occur? Why does this occur in the diamond more than other gemstones?
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8

Why does a highway sometimes appear wet on a hot summer day when it is not wet?
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9

How can you tell if a pair of sunglasses is polarizing or not?
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10

What conditions are necessary for two light waves to form an interference pattern of bright lines and dark areas?
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11

Explain why the intensity of reflected light appears to change if you tilt your head from side to side while wearing polarizing sunglasses.
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12

Why do astronauts in orbit around Earth see a black sky with stars that do not twinkle but see a blue Earth?
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13

What was so unusual about Planck's findings about blackbody radiation? Why was this considered revolutionary?
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14

Why are both the photon model and the electromagnetic wave model accepted today as a single theory? Why was this so difficult for people to accept at first?
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