Mention three properties of infrared radiations similar to visible light.

Three properties of infrared radiations which are similar to the visible light are as follows —

(a) Infrared radiations travel in a straight line like visible light, with a speed of 3 x 10⁸ m s^-1 in air or vacuum.

(b) They obey the laws of reflection and refraction.

(c) They do not produce fluorescence.