Question

A perfectly reflecting solid sphere of radius r is kept in the path of a parallel beam of light of large aperture . If the beam carries an intensity I find force exerted by beam on sphere .

Answer 1

Answer:The force exerted by the light beam on the sphere is  

Explanation:

Given data in the question  

The sphere radius,r = 1 cm

Light intensity,  

Let A be the sphere's effective area perpendicular to the light radius.

Thus force exerted on the sphere by the light beam is given,

Explanation: