June 2, 2011

3.22 Critical angle and refractive index

Recall and use the relationship between critical angle and refractive index:

c is the critical angle (in degrees,°)
n is Refractive index (no units)

What is the refractive index of glass that has a critical angle of 42°?

What is the critical angle for diamond? (Refractive index of diamond = 2.4)

1 comment:

  1. Excellent
    First answer should be n=1.5 as you only know c to 2s.f. so answer should be to 2s.f.