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If the total electromagnetic energy fall...

If the total electromagnetic energy falling on a surface is `U` then the total momentum delivered (for complate absorption) is

A

`U/c`

B

`cU`

C

`(U)/(c ^(2))`

D

`c ^(2) U`

Text Solution

Verified by Experts

The correct Answer is:
A
If the surface absorbs all the inhcident energy then the toatl momentum delivered to the surface is
`p= (U)/(c )` (for comlete absorption)
If the surface is a perfect reflector, then the total momentum delivered to the surface is
`p = (2U)/(c )` (for complete reflection )
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