00:01
Let us say we have a block off a plastic here of lock off plastic and this is the horse gentle.
00:11
This will be normal to the surface, like strikes this point here and then with threats, and it strikes the other part here it emerges out off the glass, the plastic and makes an angle office off.
00:29
That too.
00:31
This we call it.
00:32
Said that three and this one.
00:35
We call it that they want the distance from here to here.
00:39
We call it x, and this distance is l.
00:46
Um here's the end.
00:50
This is hair here, here, we can use their smells.
00:56
Oh, that is in one times a sign that our one is a court in two.
01:01
Sign that too on one is the one degrees on this is make that one is making 45 degrees.
01:10
So sign 45 visible to end times.
01:14
Sign that the three.
01:17
Um so this is a party.
01:20
The reflection that the bottom surface will be from here.
01:25
It's called a state of one.
01:28
The reflection of the bottom, sir, face at the data too is equal to 76 degrees.
01:35
Then we can write in times sign 90 minus stated...