A ray of light has an angle of incidence of 30.4� degrees

Question

on a block of quartz and an angle of refraction
of 20.7� degrees.
What is the index of refraction for this block
of quartz?

Answer 1

Review and use Snell's law.

Answer 2

N1SinQ1=N2SinQ2
1*sin(30.4)=N2Sin(20.7)
Sin(30.4)/Sin(20.7)=N2
1.43=N2