An electromagnetic wave with pointing vector 5 `W//m^(2)`is absorbed by a surface of same area. If the force on the surface is `10^(-7)`N, then area is

An e.m. wave with poynting vector 6watt//m^2 is absorbed by a surface of area 12m^2 . Find the force on the surface.

Electromagnetic radiation with energy flux 50W cm^(-2) is incident on a totally absorbing surface normally for 1 hour : If the surface has an area of 0.05m^(2) , then the avergae force due to the radiaton pressure, on it is,

A plane electromagnetic wave of intensity of 10 W//m^(2) strikes a small mmirror of area 20 cm^(2) , held perpendicular to the approcaching wave. The radiation froce on the mirror will be:

A plane electromagnetic wave of intensity of 10 W//m^(2) strikes a small mmirror of area 20 cm^(2) , held perpendicular to the approcaching wave. The radiation froce on the mirror will be: