Question

Electromagnetic waves are incident normally on a perfectly reflecting surface having surface area A. If I is the intensity of the incident electromagnetic radiation and c is the speed of light in vacuum, the force exerted by the electromagnetic wave on the reflecting surface is

• A. $\frac{2IA}{c}$
• B. $\frac{IA}{c}$
• C. $\frac{IA}{2c}$
• D. $\frac{I}{2Ac}$

Answer 1

Answer: (A)

$\frac{2IA}{c}$

Answer 2

The correct answer is Option (A) : $\frac{2IA}{c}$