A microwave is a type of electromagnetic wave. Specifically, it falls within the microwave frequency range of the electromagnetic spectrum. The electromagnetic spectrum encompasses a broad range of waves, ordered by their frequencies and wavelengths. Microwaves have longer wavelengths and lower frequencies compared to visible light but shorter wavelengths and higher frequencies compared to radio waves.
Microwaves have frequencies ranging approximately from 300 megahertz (MHz) to 300 gigahertz (GHz), corresponding to wavelengths of about 1 meter to 1 millimeter. These waves are used in various applications, including communication, radar systems, and, of course, microwave ovens for cooking and heating food.