An em wave exers pressure on the surface on which it is incident. Justify?

An em wave exerts pressure on the surface on which it is incident. Justify?

Answer the following: (a) Name the em waves which are used for the treatment of certain forms of cancer. Write their frequency range. (b) Thin ozone layer on top of stratosphere is crucial for human survival. Why? (c) An em wave exerts pressure on the surface on which it is incident. Justify.

Energy of e.m. wave is due to their

A plane electromagnetic wave is incident on a plane surface of area A, normally and is perfectly reflected. If energy E strikes the surface in time t then average pressure exerted on the surface is (c = speed of light)

A piston exering a pressure of one atm rests on the surface of water at 373K . The pressure is reduced to smaller extent and as a result 10gm of water evaporates and absorbs 22.4kJ of heat. The change in internal energy is :

As the e.m waves travel in free spaces

A plane wave of sound travelling in air is incident upon a plane water surface. The angle of incidence is 60@ . Assuming sneill's law to be valid for sound waves, it follows that the sound wave will be refrected into water away from the normal.