TS EAMCET 06 May 2019 Shift 1 Solved Paper

A parallel beam of monochromatic light of frequency 'v' is incident on a surface. The intensity of the beam is I and area of the surface is A. Find the force exerted by the light beam on the surface if the surface is perfectly reflecting and the light beam is incident at an angle of incidence θ. (The speed of light is denoted as 'c')