A light beam of intensity 20 W cm is normally normally on a

Last updated: 6/5/2023

A light beam of intensity 20 W cm is normally normally on a perfectly incident reflecting surface of sides 25 cm x 15 cm The momentum imparted to the surface by the light per second is A 1x 10 5 kg ms 1 B 5 x 10 5 kg ms 1 P 21 C 1 2 x 10 5 kg ms D 2 x 10 5 kg ms 2x20 7x10