Light That Has Been Traveling in a Medium with an Index

question 56

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.