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The figure below shows the path of a beam of light through several layers with different indices of refraction. (Assume n = 1.02.)
e₁
n = 1.60
02
n = 1.40
n = 1.20
MA
(a) If ₁ = 28.0°, what is the angle 2 of the emerging beam?
o
1
(b) What is the smallest incident angle ₁ to have total internal reflection at the surface between the medium with n = 1.20 and the medium with
Па
= 1.02?

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