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If the surface is a perfect reflector. T...

If the surface is a perfect reflector. The change in momentum of the wave after falling on the surface is :

A

P

B

2P

C

1/2 P

D

`-2`P

Text Solution

Verified by Experts

The correct Answer is:
D
When the wave falls on perfect reflector then its momentum is reversed.
so change iin momentum `Delta p = p_(2) - p_(1) = - p - = - 2p` .
So correct choice is d.
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