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Sahay Sir > Question Answers > MTG NEET Physics > Part 2 > Chapter 11 - Dual Nature of Radiation and Matter > A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60 degree and the number of photons striking the mirror per second is (5 x (10^19)). Calculate the force exerted by the light beam on the mirror.

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60 degree and the number of photons striking the mirror per second is (5 x (10^19)). Calculate the force exerted by the light beam on the mirror.

Angular momentum (L) and radius (r) of a hydrogen atom are related as