waley
Homework Statement
A beam of white light goes from air into water at an incident angle of 75 deg. What is the critical angle that the violet (410 nm) parts of the light is refracted?
Homework Equations
n1sin(θ1)=n2sin(θ2)
n=c/v
c=λf
The Attempt at a Solution
So sure, I get that the answer is supposed to be 46 degrees. I got this by looking up the index of refraction of violet light in water then using Snell's law. But I do know that the wavelengths of the same wave differ in different materials, and the problem gives us the wavelength of violet light. Is there a way I can calculate this index by myself without having to look it up?