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A radiation of energy `E` falls normally on a perfctly refelecting surface . The momentum transferred to the surface is

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A radiation of energy `E` falls normally on a perfctly refelecting surface . The momentum transferred to the surface is
A. `E//c`
B. `2E//c`
C. `Ec`
D. `E//c^(2)`
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Correct Answer - B
Total change in momentum from a reflecting surface `=2P`
image
The momentum of incident radiation `P=(2E)/c`
Hence, momentum transferred `=(2E)/c`
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