|Q1: Using a diagram,
derive the formula for calculating the critical angle given index
of refraction of a substance in air, which is 1.00.
Q2: If a diamond
has an index of refraction n = 2.42, what is the critical angle
for a diamond in air?
Q3: Why are the top
facets of this diamond at such a steep angle and the lower facets
at such a shallow angle to a ray of light entering vertically from
does a perrfectly clear diamond appear blue and not red in sunlight?