Question

Light propagates faster through a Medium A than through another Medium B.
(a) Which of the two media has a higher optical density?
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Answer 1

Answer:

Explanation:

Since light travels faster in Medium A. Medium B is optically denser than Medium A. If the ray of light passes at an angle of 90° from Medium A to Medium B there is no change in direction of propagation.

Medium 2 has higher optical density. More the optical density, lesser the speed of light through that medium. Hence Medium 1 is less optically dense than Medium 2.

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