Question

Name any two devices which work on the principle of echo

Answer 1

The two devices work on priciple of echo is.:
•SONAR(sound navigation and ranging) - its used to detect unseen underwater objects. Transducer sends ultrasonic sound and detects objects by using echoed(reflected) ultrasonic sound waves.
•ultrsonic sonography - used in radiology for detecting disorders of internal organs. Transducer sends ultrasonic sound in to human body and picturise internal of body by using echoed(reflected) sound waves.