GR0877 Problem 76
PROBLEM STATEMENT: This problem is still being typed.
SOLUTION: (B) According to Snell’s law , where is the angle of refraction. The critical angle for the total internal reflection is determined by , where . From these three equations it is easy to obtain the critical angle of incidence: . Thus, we must choose between (A) and (B). Now, if we increase , will increase and will decrease, which prevents the total internal reflection. Therefore, choice (B) is correct.
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