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A glass is half-full of water, with a layer of oil (n = 1.44) floating on top. A ray of light traveling downward through the oil is
incident on the water at an angle of 73.0°. Take the refraction index of water to be 1.333. (a) Determine the critical angle
for the oil-water interface. (b) Will the ray penetrate into the water?
(a) Number
(b)
Units

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