00:01
So let's start with the problem over here.
00:01
We are having a glass lab, okay? so let me just make the glass lap like this.
00:07
This is the glass lap.
00:09
This will be the glass lab.
00:11
Let me just write glass lab.
00:15
The refractive index mu is given as 3x2.
00:18
Okay, mu is equal to 3 by 2.
00:20
We have incident rays, okay, parallel beam.
00:23
So like this, parallel beam will come.
00:26
Okay, this is parallel.
00:27
And after incidence at the interface they will undergo refraction so the refracted ray will be also parallel to each other so this will be the angle of incidence and this will be the refractive angle of refraction okay okay so we have been told to find the width of the refracted parallel beam okay so so how we will measure is from at this point to this.
01:03
Okay.
01:04
So we will just extend.
01:06
This will be d.
01:08
Okay.
01:09
And from this point, this will be the width of refractor ray.
01:12
This will be d dash.
01:13
Okay.
01:14
So we have to find d dash.
01:16
So let's start.
01:19
Let me just make the angles given as it is.
01:21
This is also i.
01:23
And this will be r.
01:25
Okay.
01:26
So let's start.
01:27
Okay.
01:27
Let me just name the points.
01:29
This will be p and this will be q...