An electromagnetic wave of intensity falls on a surface kept in vacuum and exerts…

PHYSICS · Multi correct · CBSE · Physics · Electromagnetic Waves · Electromagnetic Waves

Problem

An electromagnetic wave of intensity

I

falls on a surface kept in vacuum and exerts radiation pressure

p

on it. Which of the following are true? (1) Radiation pressure is

I/c

if the wave is totally absorbed. (2) Radiation pressure is

I/c

if the wave is totally reflected. (3) Radiation pressure is

2I/c

if the wave is totally reflected. (4) Radiation pressure is in the range

I/c<p<2I/c

for real surfaces.