The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly

The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly
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(3) Remains unaltered Explanation: The speed of light with the rise in the temperature of the medium remains unaltered because speed of light doesn't depend on temperature. It does depend, however, on the refractive index of the substance it is travelling through. The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics.
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