The 'radar' beams microwaves towards a distant object and receives the reflected signals. Since both the outgoing and incoming waves travel with the velocity of light therefore by measuring the 'time delay' in receiving the signal back, we can measure the distance of the object from the radar. In this way, the precise location of the distant object is made possible.
Microwaves play an important role in telecommunications. The artificial satellites have made it possible to transmit signals from one point on Earth to practically any other point on Earth. The signals from a broadcasting station on Earth are beamed towards an artificial satellite, which sends these signals back to Earth.
