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Refractive Index

If medium A i...

Question

If medium A is optically denser than medium B, then the speed of light is
(a) the same in both mediums.
(b) higher in medium A than in medium B.
(c) higher in medium B than in medium A.
(d) higher in medium A or B depending on which medium is thicker.

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Solution

(c) higher in medium B than in medium A

The speed of light decreases in a denser medium.

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