Question

Arrange the following electromagnetic waves in order of increasing frequency:
$\gamma -rays$, microwaves, infrared rays and ultraviolet rays.

Answer 1

Electromagnetic radiation is classified into types according to the frequency of the wave. These types include, in order of increasing frequency, radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.

The frequency is the inverse of wavelength.

Hence, in the order of increasing frequency, the waves are $Microwave<Infrared<Ultraviolet<\gamma -rays$.