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The critical angle for total internal
reflection at a liquid-air interface is
43.5°.
If a ray of light traveling in the liquid
has an angle of incidence of 30.0° at
the interface with respect to the
normal, what angle does the refracted
ray in the air make with the normal?
If a ray of light traveling in air has an
angle of incidence of 30.0⚫ at the
interface with respect to the normal,
what angle does the refracted ray in
the liquid make with the normal?

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