A layer of ethyl alcohol (n = 1.361) is on top of water (n = 1.333). To the nearest degree, at what angle relative to the normal to the interface of the two liquids is light totally reflected?

a. 78°
b. 88°
c. 68°
d. 49°
e. the critical angle is undefined


a

Physics & Space Science

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A.
B.
C.
D.
E.

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