Question

difference between radar and sonar

Answer 1

Both radar and sonar locate objects from the echo of a signal that is bounced off the object. Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects.

Answer 2

radar is used to find distance between the obstacles in the air,mainly used in aeroplanes
and sonar is used to detect underwater depth by using utrasonic waves, mainly used in ships