Light That Has Been Traveling in a Medium with an Index

Multiple Choice

Light that has been traveling in a medium with an index of refraction n₂ is incident on the boundary surface of another medium with an index of refraction n₁.Given a sufficient angle of incidence,which of the following conditions must be satisfied for total internal reflection to occur?

A) n₁ < n₂
B) n₁ > n₂
C) n₁ = n₂
D) Any of these may be correct.
E) None of these is correct.