Question

Q.8 What is meant by Infra sound and Ultra sound? Write any two applications of Ultra sound.​

Answer 1

Answer:

Explaining the terms infrasound and ultrasound, used for vibrations that we cannot hear. Our ears can detect only a relatively small range of frequencies of vibration. ... Infrasound, where the rate of vibration is too low for us to hear. Ultrasound, where the rate of vibration is too high for us to hear.

Ultrasound are used by bats to locate obstacles in their path, to drill holes in materials like glass, cleaning minute objects, detection of defects in metals, imaging human organs by ultrasonography and echo cardiography, remove cataract and in SONAR(Sound navigation and ranging) to detect and find distance of objects ...