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Optical Density

Out of air an...

Question

Out of air and glass, which is optically rarer ? Give reason.

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Solution

Air is RARER speed of light in air is more than speed of light in glass.
3 × 10 8 ms -1 > 2 × 10 8 ms -1
speed of light in air speed of light in glass

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What do you mean by optically denser and optically rarer mediums?

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