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


A) additive.
B) subtractive.
C) multiplicative.
D) divisive.

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The solar radiation curve is


A) a dent in the otherwise spherical sun.
B) the path taken by the sun as it travels around the Earth.
C) a plot of brightness of sunlight versus its frequency.
D) a plot of the colors of sunlight versus their frequencies.
E) a plot of light intensity versus distance from the sun.

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Which interacts more with sounds of relatively high frequencies?


A) large bells
B) small bells
C) both the same

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The sky is blue because air molecules in the sky act as tiny


A) mirrors which reflect only blue light.
B) resonators which scatter blue light.
C) sources of white light.
D) prisms.
E) none of these

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Colors seen on TV results from color


A) addition.
B) subtraction.
C) either of these
D) neither of these

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A mixture of red and green pigments appears


A) orange.
B) yellow.
C) magenta.
D) blue.
E) blackish brown.

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


A) bluish.
B) greenish.
C) yellowish.
D) reddish.
E) untinted.

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A

A whitish sky is evidence that the atmosphere contains


A) predominantly small particles.
B) predominantly large particles.
C) a mixture of particle sizes.
D) water vapor.
E) pollutants.

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


A) transmitted.
B) absorbed.
C) reflected.
D) all of these
E) none of these

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Color depends on what characteristic of light?


A) its frequency
B) its amplitude
C) both of these

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Complementary colors are two colors that


A) look good together.
B) are additive primary colors.
C) are subtractive primary colors.
D) produce white light when added together.
E) are right for each other.

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A variety of sunset colors is evidence for a variety of


A) elements in the sun.
B) apparent atmospheric thicknesses.
C) atmospheric particles.
D) atmospheric temperatures.
E) primary colors.

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C

The greenish blue of water is evidence for the


A) reflection of greenish-blue light.
B) reflection of red light.
C) absorption of greenish-blue light.
D) absorption of red light.
E) interaction between green and blue frequencies of light.

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


A) red-orange.
B) orange-green.
C) green-blue.
D) blue-violet.
E) none of these

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The part of the electromagnetic spectrum most absorbed by water is


A) infrared.
B) lower frequencies in the visible.
C) middle frequencies in the visible.
D) higher frequencies in the visible.
E) ultraviolet.

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


A) bluish.
B) greenish.
C) yellowish.
D) reddish.
E) untinted.

Correct Answer

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


A) addition.
B) subtraction.
C) either of these
D) neither of these

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A sheet of red paper will look black when illuminated with


A) red light.
B) yellow light.
C) magenta light.
D) cyan light.
E) none of these

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The complementary color of blue is


A) red.
B) green.
C) yellow.
D) cyan.
E) magenta.

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


A) red
B) white
C) blue
D) yellow
E) orange

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C

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