00:01
Hello students here is an given question and the question says a ray of light is traveling from air to water.
00:07
This is the interface here.
00:10
This is the air and this is water is given.
00:14
Okay, from air to water what is the angle of incident? okay, let's suppose this is the ray is coming like this and this is the normal.
00:24
This is angle i.
00:25
Okay.
00:27
After refraction, this will go like this.
00:30
Is just because of we know that, we know that this is the denser media.
00:34
Then it will bend towards the normal, okay, and the refraction angle, this is the r.
00:41
And we want to find out what is the angle i, that is angle r is given, that is 45 degree, 45 degree, okay, and the refractive index of water, okay, refractive index of water, that means mu 2 is given, that is equal to how much, that is 1 .5.
01:00
1 .32 and this is the mu 1 is equal to mu of air okay or we know that this is the 1 we have to find out this sign or this is the i okay from from snail's low the snail slow the snail slow says the mu 2 1 is equal to the mu 2 by mu 1 is equal to the sign i by sign r okay from these two from these two terms.
01:31
Mu 2 is equal to the muw, divided by, a mu1 is equal to the mu a .r is equal to sine i divided by sine r.
01:40
All the values are given.
01:41
What is the muw? mew w is given, that is 1 .32, that is 1 .32 divided by 1 is equal to the sine of i divided by sine or what is the value of r? value of r is 45 degree.
01:55
That is 45 degree...
