A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in time t then average pressure exerted on the surface is ( 
speed of light)
A
zero
B
E/Atc
C
Atc
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Incident momentum, 
For perfectly reflecting surface with normal incidence
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