A parallel beam of monochromatic light of wavelength 660 nm is incident on a totally reflecting plane mirror. The angle of incidence is 
and the number of photons striking the mirror per second is 
. What will be the force exerted by the light beam on the mirror?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Energy falling per second on the mirror
Momentum of the incident light per sec.
Momentum of the incident light per second normal to the plane mirror 
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