You Could Determine the Index of Refraction for Visible Light

Multiple Choice

You could determine the index of refraction for visible light of a dark but reflective medium such as black glass by measuring the

A) angles of incidence and refraction.
B) angle of reflection for an arbitrary angle of incidence.
C) angle at which reflected light is completely polarized.
D) smallest angle at which X-ray diffraction occurs in the glass.
E) smallest angle at which diffraction occurs for visible light when a diffraction pattern is scratched onto the surface.