Question

What is Radiation?

Answer 1

Radiation is that method of heat transfer which does not require any material medium.

In this process heat energy is transferred in the form of electro-magnetic waves. The properties of radiation are similar to those of light.

• It travels with the velocity of light (3 x 10⁸ m s^-1 in vacuum).
• It shows all the properties of light, i.e. reflection, interference, polarization etc.
• It obeys inverse square law.