Question

draw the path of a ray when it enters with some angle of incidence to the surface of a glass slab.​

Answer 1

Explanation:

Here i = the angle of incidence

r = the angle of refraction

And,

r = i

Answer 2

Answer:

In the case of refraction through a glass slab

1.)Angle of incidence is greater than the angle of refraction.

Reason :As the ray travels from rarer to denser, bends towards the normal.

velocity of light in the medium is lesser than velocity of light in air.

2.)Angle of incidence and angle of emergence are equal.

Reason:glass slab is a combination of two prisms placed close to each other such that prism 2 is in tilted position so that dispersion produced in first prism will recombine after passing through second prism.

The incident ray oflight and the emergent ray of light are parallel to each other.