A tank holds a layer of oil, 1.76 m thick, which floats on a layer of syrup that

Question

A tank holds a layer of oil, 1.76 m thick, which floats on a layer of syrup that is 0.76 m thick. Both liquids are clear and do not intermix. A ray, which originates at the bottom of the tank on a vertical axis, crosses the oil-syrup interface at a point 0.90 m from the axis. The ray continues and arrives at the oil-air interface, 2.00 m from the axis and at the critical angle. In the figure, the index of refraction of the syrup is closest to:

Answers:       

A. 1.65

B. 1.47

C. 1.22

D. 1.31

E. 1.82

Explanation / Answer

B

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