Microwaves lie between radio waves and infrared, waves in the electromagnetic spectrum. They are called ‘micro’ waves because they have a shorter wavelength than radio waves.
Microwaves are used for the following :
Communication: They can pass through the atmosphere and reach satellites orbiting around the Earth. Since they have a shorter wavelength than radio waves, they do not spread out or bend as much as radio waves. Hence they are used to beam signals from place to another.
Microwaves ovens : Microwaves produce a heating effect when absorbed by materials. Food items absorb certain Microwaves frequencies strongly and this principle is used in Microwaves ovens.