The good directional property of ultrasound waves are used for ________.

What are ultrasounds?

What are applications of ultrasound ?

How is ultrasound used for cleaning ?

State essential properties of e.m. waves.

Electromagnetic waves Electromagnetic waves are those waves in which there are sinusoidal variations of electric and magnetic fields at right angle to each other as well as right angle to the direction of propagation. The ratio of electric vector and magnetic vector gives the velocity of light and vecExxvecB gives the direction of propagation of electromagnetic wave. The electric and magnetic field of an electromagnetic wave are