The physical factor distinguishes thermal radiation from visible light is .

Thermal radiations

Thermal radiations are

What is the order of radiation pressure of visible light in Nm^(-2) ?

The spectrum of thermal radiation from a blackbody is

Give two properties of ultraviolet radiations which differ from visible light.

Assertion : Cones of retina help in colour vision. Reason : Different types of cones are stimulated by different radiations of the visible light.

Give two properties of infrared radiations which differ from visible light.

How are gamma radiations produced ? Mention two common properties of the gamma radiations and visible light.