A perfecting reflecting mirror has an area of 1cm2. Light energy is allowed to fall on it for an hour at the rate of 10 Wcm-2. The force that acts on the mirror is
Given: -
Area of the mirror = 1 cm2,
Power transmitted to the mirror = 10 Wcm-2,
Calculations: -
The average force is given by ,
Since the surface is perfectly reflecting we can write
So
6.7×10-8 N