Question

are there any two different medium in which speed of light is same?​

Answer 1

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Yes. Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one. This was discovered by Jean Foucault in 1850

Explanation:

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Answer 2

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ANSWER==> Yes. Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one