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A pulse of light of duration 100ns is al...

A pulse of light of duration `100ns` is alsorbed completely by a small object inillally at rest power of the pulse is `30 mW` and the speed of light is `3 xx 10^(8) ms^(-1)` The final momentum of the object is

A

`0.3 xx 10^(-17) kg ms^(-1)`

B

`3.0 xx 10^(-17) kg ms^(-1)`

C

`1.0 xx 10^(-17) kg ms^(-1)`

D

`9.0 xx 10^(-17) kg ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`p = (E )/(c ) = (p xx1)/© = (30 xx 10^(-3) xx10^(-9))/(3 xx10^(8)) = 110^(-17) kg ms^(-1)`
option b is currect
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