Question

A ray of light travels from diamond of refractive index 2.42 to water of
refractive index 1.33. Calculate the refractive index of water to
diamond and diamond to water. In which of the medium the light
travels with greater speed? How does the ray of light bend in water?​

Answer 1

From Snell's Law, μ=sinrsini

As r=2i

So, μ=sin2isini=sin2i2sin2icos2i

=2cos2i

⇒cos2i=2μ

⇒2i=cos−12μ

⇒i=2cos−12μ.

hope helps u I'm not good in this