Question

a ray of light makes an angle of 50° with the surface S1 of the glass slab . Its angle of incidence will be..........
a)50° b)40° c)140° d)0°

Answer 1

Given : a ray of light makes an angle of 50° with the surface S1 of the glass slab .

In simple words it is given that angle of reflection is = 50° .

Now ,

To Find :

Angle of Incidence.

Solution :

As we know angle of reflection = Angle of incidence

50° = 50°

Option A = 50° is correct .

Answer 2

This answer is 50 because i=r