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Figure 23.3a

A tank holds a layer of oil, 1.95 m thick, which floats on a layer of syrup that is 0.64 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 Figure 23.3a, the index of refraction of the oil is closest to:

• 2.02

• 2.00

• 2.04

• 2.06

• 2.08

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