Question

Light with energy flux `36Wm^(-3)` is incident on a circular part of radius `1.4m` of a perfectly balck body. The force experienced by the body and the momentum delivered in `10 minutes` are
A. `2.2 muN`, `7.2 mu kgms^(-1)`
B. `3.5 muN`, `7.4 mu kgms^(-1)`
C. `0.74 muN`, `444 mu kgms^(-1)`
D. `7.4 muN`, `2.2 mu kgms^(-1)`

Answer 1

Correct Answer - C
Momentum `P=(U)/(C )=(IA t)/(C )`, Force `F=(IA)/(C )`