Light with energy flux of `24Wm^(-2)` is incident on a well polished disc of radius `3.5 cm` for one hour. The momentum transferred to the disc is

Options

A. 1.1`mu` kg `ms^(-1)`
B. 2.2 `mu` kg `ms^(-1)`
C. 3.3 `mu` kg `ms^(-1)`
D. 4.4 `mu` kg `ms^(-1)` \

Answer

B

Explanation

`P = (2U)/(C ) = (2IAt)/(C )`