00:01
Hello everyone, so today i will be solving this question for you.
00:04
Let me write the solution over here.
00:06
So basically in this question, we have been given that there is a glass fair, all right? and a ray is incident on it, and we know that this ray will bend towards the normal, like this, and then again we will have the normal meeting up here and this normal meeting up here.
00:28
So we will have this point o.
00:29
All right.
00:30
This is angle of incidence, okay? and let's say this is angle c and this will again also be angle c and this wave is moving like this.
00:39
Now we know that ray doesn't come out from the sphere meaning total internal reflection tir takes place.
00:59
Okay, hence from the figure that we have made here, we can have that angle a, b, o.
01:07
A is basically this, okay, and b is basically this.
01:11
A, b, o, o, a, b, is equal to angle oab, like we have marked, it is equal to c...