A ray of light is incident normally on a plane glass slab. What will be (i) the angle of refraction and (ii)

(i) i2 = i1 (ii) Angle of deviation is minimum Explanation: In minimum deviation position, the refracted ray inside the prism travels parallel to it if the prism is equilateral and the...

(a) If the incident ray normal to prism then angle of incidence is 0o. (b) In this case the angle of refraction from the first face r1 = 0o. (c) As the...

The light ray bends at both the surfaces of prism towards its base.

(d) its second focus

Both deviation and dispersion. Hint: When a white light ray falls on the first surface of a prism, light rays of different colours due to their different speeds in glass get...

The angle of incidence will be : 3. 35°

The angle between the incident ray and the reflected ray is   3. 60° 

1. reflected ray

Angle of incidence is 0°. Since angle of incidence is’the angle between incident ray and normal. Direction of reflected ray is along BA opposite to the direction of incident ray.

(i) Laws of refraction : (a) The incident ray, the normal and the refracted ray, all lie in the same plane. (b) The ratio of sine of the angle of incidence and...