00:01
As for the question, we are given with the condition that this is a slab, right? the refractive index here is n1.
00:10
This is the refractive index, n2.
00:12
A light is incident here, so we can call this as incident.
00:16
This is the normal, and it is making angle theta 1 with the normal.
00:21
This is reflected ray, right? and this will be the refracted ray.
00:27
So it is making angle theta 2 here.
00:31
So this will be theta 1.
00:33
Suppose this will be theta 3.
00:34
Now we have to find this angle 5 between reflected and reflected ray.
00:40
So this is reflected and this is refracted ray.
00:45
And this one is incident ray.
00:48
Right? so this is the diagram given to us.
00:50
So here it is given.
00:52
N1 is refractive index of air.
00:55
So this will be 1.
00:57
And n2 is the refractive index for the flint glass.
01:01
So it is not mentioned.
01:03
We are assuming it as 1 .65, right? theta 1 is the angle of incidence, which is equal to angle of reflection.
01:13
It is given to us as 26 degree, right? so, theta 2 we don't know and phi we don't know.
01:23
Right? for this, what we will apply? we will apply snell's law first...