A light beam of intensity $20 \frac{\text{W}}{\text{cm}^2}$ is incident normally on a perfectly reflecting surface with sides 25 cm × 15 cm. The momentum imparted to the surface by the light per second is?

Question

$1.2 \times 10^{-5}\, \text{kg}\, \text{m}\, \text{s}^{-1}$

$2 \times 10^{-5}\, \text{kg}\, \text{m}\, \text{s}^{-1}$

$1 \times 10^{-5}\, \text{kg}\, \text{m}\, \text{s}^{-1}$

$5 \times 10^{-5}\, \text{kg}\, \text{m}\, \text{s}^{-1}$

Solution

Please login to view the detailed solution steps...

Go to DASH