Question

State the principle of Radar. What are the applications of Radar?

Answer 1

Radar works on the principle of 'radio echoes'. The transmitter radiates high energy electrical pulses into space. These pulses when incident on a target, get scattered. The scattered pulse is received by the antenna. Pulse travels with the speed of light. By measuring the time taken by the pulse to reach the target and back to the transmitter, distance of the target is determined.

Applications:
i) Air and sea navigation is made safe with radar installations.
ii) Radar systems are used for the safe landing of air crafts.
iii) Rain drops may reflect suitable radar signals and thus enable the meteorologists to measure the distance of the clouds with great accuracy for forecasting.
iv) Pulse can be used discovering the position of buried metals, oils and ores.