00:02
Hi, this question is regarding refraction of light.
00:05
Using filters, a physicist has created a beam of light consisting of three wavelengths, 400 nanometer for violet, 500 nanometer for green and 650 nanometer for red.
00:18
She aims the beam so that it passes through air and then enters a block of crown glass.
00:25
The beam enters the glass at an angle of incidence theta 1 as 45 .3 degrees.
00:31
First part of the question upon entering the glass are all three wavelengths refracted equally or is one bent more than the others? so we are given with four options.
00:44
400 nanometer light is bent most, 500 nanometer light is bent most, 650 nanometer light is bent most or all colors are refracted alike.
00:56
So we know what is refraction.
00:59
Refraction is bending of light when it travels from one medium.
01:02
To other medium.
01:04
And this happens because of the change in speed of light.
01:10
This angle of refraction theta 2 is inversely related to wavelength of light, which means shorter the wavelength, more will be the angle of refraction.
01:24
More will be the bending there, the amount of bending.
01:28
Hence, we can say that violet color, which has the shortest wavelength given among all the three of value 400 nanometer, this will bend more because of its lesser wavelength, shorter wavelength.
01:50
So correct answer will be option a here, 400 nanometer light is bent to most because it will still slow down further.
02:00
Let's move on to the next part.
02:02
Part b of the question is what are the respective angles of refraction for the 3 ?5.
02:08
For the 3 .5.
02:08
For the 3 .5.
02:08
3 wavelengths...