Question:medium
Define refractive index of a medium in terms of speed of light.
Define refractive index of a medium in terms of speed of light.
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Refractive index is a pure number with no units. If a medium has a higher refractive index, it is optically denser, meaning light travels slower inside it ($v = c/\mu$).
Updated On: Jul 2, 2026
- It is the ratio of the speed of light in a vacuum to the speed of light in the medium.
- It is the ratio of the speed of light in the medium to the speed of light in a vacuum.
- It is the product of the speed of light in a vacuum and the speed of light in the medium.
- It is the reciprocal of the speed of light in a vacuum.
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The Correct Option is A
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