Microwaves

Microwaves are very similar to UHF radio waves. They have wavelengths of a few centimeters.
Microwaves are produced by special electronic devices such as the klystron tube.
Microwaves are used to transmit television signals and are also used in telecommunications.
Due to its short wavelength, relative to radio waves, the microwave signal can travel in a straight line without losing much of its energy.
Radar systems use microwaves to find the direction and distance of objects which reflect the microwaves back to a large receiving aerial mounted near the transmitter.
Nowadays, another common use of microwaves is in microwave ovens.