A beam of white light is incident normally on a plane surface absorbing 
of the light and reflecting the rest. If the incident beam carries 
of power, the force exerted by it on the surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
For non-reflecting surface or perfect absorbing surface
For non-reflecting surface
Here, 
is absorbed and 
is reflected
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