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Question
A light ray enters from medium A to medium B as shown in the figure.
Which one of the two media is denser w.r.t. other medium? Justify your answer.
Solution
When a ray arrives from medium A, it moves towards normal in medium B. So, medium B has a higher optical density than medium A. This indicates that the refractive index of medium B relative to medium A's refractive index will be higher than 1.
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