Question

A bat emits ultrasonic about events ultrasonic wave of frequency 30 kilohertz if its speed is 350 M per second and that has its echo after 0.6 seconds find how far is back from the obstacle and wavelength of the wave

Answer 1

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.