9] A transparent cube of side 210 mm contains a
small air bubble. Its apparent distance, when
viewed through one face of the cube is 100
mm and when viewed through the opposite
face is 40 mm. What is the actual distance of
the bubble from the second face and what is
the refractive index of the material of the
cube? (Ans.: 1.50]
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can I give another example like this
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Answer:1.5
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