Light passing from water to air is incident on the interface at an anle 1 from t

Question

Light passing from water to air is incident on the interface at an anle 1 from the normal.

Part A - Which expression gives the angle at which the light emerges into the air relative to the surface?

nwater = 4/3

nwater = 4/3

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Part B - Which expression gives the incident angle from the normal for which no light crosses the interface (critical angle)?

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Part C - What happens to the light incident to the normal of the interface at an angle greater than the critical angle?

Explanation / Answer

Part B

Option c, sin^-1(3/4)

Part C

Option d, Above the critical angle, the phenomenon is called Total Internal Reflection (TIR). 100% of the light is reflected. No light transmitted means that there is no viable propagating solution to the Helmholtz equation in the exiting medium

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