Question

Light with energy flux `18wcm^(-2)` is incident on a mirror of size `2cmxx2cm` normally. The force experienced by it and momentum delivered in one minute are
A. `0.48 muN`, `28.8 mu kgms^(-1)`
B. `48 muN`, `2.88 mu kgms^(-1)`
C. `28.8 muN`, `4.8 mu kgms^(-1)`
D. `0.24 muN`, `28.8 mu kgms^(-1)`

Answer 1

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