If N₁ Is the Index of Refraction for the Incident

Multiple Choice

If n₁ is the index of refraction for the incident medium and n₂ is the index for the refracting medium, the critical angle will exist

A) in all cases, it will just have different values.
B) when n₁ < n₂.
C) when n1 = n2.
D) never.
E) when n₁ > n₂.