(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Calculate the angle of incidence for an angle of refraction of 10° for

a) Diamond (2.42) to air

θ2=Angle of refraction=10°

n2=Index of refraction on refractive medium=1

n1=index of refraction on incident medium=2.42

θ1=?

2. Relevant equations

n1sinθ1=n2sinθ2

3. The attempt at a solution

The book's answer tells me the answer is 24.8°

I rearranged the equation to find theta1 or the angle of incidence

θ1=sin inverse(n2sinθ2/n1)

I substituted the values and I got 4.1°

Can someone help me? I can't figure out what I did wrong. Light is coming from a dense medium to a less dense medium (diamond to air) so where the incident ray originated from the dense medium which is n2. So confused..

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Geometric Optics: Snell's Law calculation problem

**Physics Forums | Science Articles, Homework Help, Discussion**