Q.
A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (C = Velocity of light )
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a
2EC2
b
EC2
c
EC
d
2EC
answer is D.
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Detailed Solution
Energy of radiation, E=hv=hCλ Also, its momentum p=hλ=EC=pipr=-pi=-ECSo, momentum transferred to the surface =pi-pr=EC--EC=2EC
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