Question

Which description best explains how a Doppler radar system works?

O A. It refilects waves off of objects, measuring the difference of the waves it sends and receives.
OB.
It sends out a set of waves where each wave is preprogrammed to detect a certain kind of object.
© C It uses an antenna to measure the angle
two or more oo ects i
distant space
© D.
it uses the Doppler effect to raise trie pitch of sound waves so objects in distant space can be he:

Answer 1

Answer : (A) "It reflects waves off of objects, measuring the difference of the waves it sends and receives".

Explanation :

In Doppler radar system, radio waves emitted from an antenna. It gives information about the motion of targets and their position.

Phase change between a transmitted wave and received echo is calculated using Doppler radar system.

It also gives radial velocity i.e. velocity in the direction of radar. If the phase shift is positive this means the motion is toward the radar and if the phase is negative this implies the motion is away from the radar.

So, the correct option is (A) "It reflects waves off of objects, measuring the difference of the waves it sends and receives".