What happens to RI of a material when temperature increases?

Decreases due to increase of speed of light in air

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Decreases due to decrease of speed of light in air

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Decreases due to increase of speed of light in the material

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Decreases due to decrease of speed of light in the material

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Remains unchanged as speed of light increases both in the material and the air

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Solution

The correct option is C
Decreases due to increase of speed of light in the material

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