Question
What are thermal radiations. State few properties of thermal radiations.
Solution
Thermal radiations is the heat energy emitted by a body in the form of radiation.
Following are the properties of thermal radiations:
(i) These radiations are electromagnetic in nature.
(ii) These radiations travel in a straight line with the speed of light.
(iii) These radiations can travel through vacuum as well as in medium.
(iv) In a homogenous media, these radiations travel equally in all the direction.
(v) These radiations undergo the phenomenon of reflection, refraction, etc.
