Two light beams of different frequency but the same intensity fall on a black (totally absorbing) surface, striking perpendicular to the surface. Which of the following statements are true? (There could be more than one correct choice.)
A) The light beams exert no pressure on the surface because light is just energy.
B) Both beams exert the same pressure on the surface.
C) Painting the surface white would not affect the pressure on it due to these beams.
D) If the surface were painted white (totally reflecting), the pressure on it would be less than when it was black.
E) The high-frequency beam exerts more pressure on the surface.
Question 2
Except for their color, a perfectly black (absorbing) object is identical to a perfectly white (reflecting) object. If identical light falls on both of these objects, what is true about the momentum they will receive from this light?
A) The white object will receive twice as much as the black object.
B) The white object will receive four times as much as the black object.
C) The black object will receive four times as much as the white object.
D) The black object will receive twice as much as the white object.
E) They will both receive the same amount.
Fall
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