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Light with energy flux of 18W//cm^(2) fa...

Light with energy flux of `18W//cm^(2)` falls on a non reflecting surface of area `20cm^(2)` at normal incidence the momentum delivered in `30 minutes` is

A

`1.2 xx 10^(-6) " kgms"^(-1)`

B

`2 .16 xx 10^(-3) "kgms"^(-1)`

C

`1.18 xx 10^(-3) " kgms"^(-1)`

D

`3.2 xx 10^(-3) " kgms"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`p = (U)/(C ) = (IAt )/(C)`
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