A mirror works on the principle of
and a lens works on the principle of

A mirror works on the principle of reflection. This law states that :

Angle of the incidence is equal to the angle of reflection.

The incident ray, the reflected ray, the normal and the point of incidence all lie in the same plane.

Hence, the correct option is (B).

A lens works on the principle of refraction of light. This law states that :

where sin i is the sine of angle of incidence and sin r is the sine of angle of refraction.

The incident, reflected, normal all lie in the same plane.

Hence, the correct option is (A).

Explanation:

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.