Question

Mention one practical use of echoes.

Answer 1

1. SONAR which stands for Sound Navigation And Ranging.
2. It works on the principle of echo.
3. It is a method of navigating, measuring distances, communicating with, or detecting objects on or beneath the water's surface.
4. A transmitter and a detector make up the system of SONAR.
5. The ultrasonic sound waves are sent by the transmitter.
6. Applications in medical science like ultrasonography.