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Question
Observe the given ray diagram and compare:
- the speed of light in medium A and the speed of light in medium B.
- the optical densities of medium B and medium C.
Very Long Answer
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Solution
(i) In the diagram, the ray of light bends towards the normal when it travels from medium A to medium B. This indicates that medium B is optically denser than medium A.
Since the speed of light is inversely proportional to the optical density of the medium, the speed of light in medium A > the speed of light in medium B.
(ii) At the interface of medium B and medium C, the ray of light bends away from the normal. This shows that medium C is optically rarer than medium B.
Therefore, the optical density of medium B > the optical density of medium C.
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