In the figure, two light rays pass from air through five layers of transparent p

Question

In the figure, two light rays pass from air through five layers of transparent plastic and then back into air. The layers have parallel interfaces and unknown thicknesses; their indexes of refraction are n_1 = 1.7, n_2 = 1.7, n_3 = 1.7, n_4, = 1.6, and n_5 = 1.5. Ray b is incident at angle theta b = 34 degree. Relative to a normal at the last interface, at what angle do ray a and ray b emerge? If the air at the left and right sides in the figure were, instead, glass with index of refraction 1.4, at what angle would ray a and ray b emerge? Number Units Number Units Number Units Number Units

Explanation / Answer

a) 90 degrees

b) 34 degrees

c) 90 degrees

d) 34 degrees

Apply Snell's law at every interface.

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