What are the values of the angle of incidence and the angle of reflection for normal incidence on a plane mirror ?

What is incidence angle ?

In the above figure (ray diagram), state the angle of incidence and the angle of deviation.

A sound wave travels from air to water. The angle of incidence is alpha_1 , and the angle of reflection is alpha_2 . If the Snell.s law is valid, then ......

If the angle of incidence is equal to critical angle, then the angle of refraction is

When a ray of light enters into the medium of refractive index of mu , angle of refraction is half of angle of incidence so angle of incidence = ......

Light of wavelength 5000 Å falls on a plane reflecting surface. What are the wavelength and frequency of the reflected light? For what angle of incidence is the reflected ray normal to the incident ray?

What is maximum value of plane angle and solid angle ?

A light ray is incident on air-liquid interface at 45^@ and is refracted at 30^@. What is the refractive index of the liquud? For what angle of incidence will the angle between reflected ray and refracted ray be 90^@? (AS_(7))