A parallel beam of monochromatic light of wavelength 663 nm  is incident on a totally reflecting
Channel: Doubtnut
Date: 2020-07-12

A parallel beam of monochromatic light of wavelength 663 nm  is incident on a totally reflecting plane mirror. The angle of incidence is `60^@` and the number of photons striking the mirror per second is `(1.0 xx (10^19))`. Calculate the force exerted by the light beam on the mirror.