Question

The refractive index of transparent medium is equal to __________​

Answer 1

Answer:

1 one

Transparent medium become invisible in vacuum if its refractive index becomes equal to 1, since refractive index of vacuum is also unity because of which refraction of light will not take place in the transparent medium.

Explanation:

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Answer 2

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The Refractive index of a transparent medium is defined as the ratio of the speed of light in air i.e. vacuum to the speed of light in a medium. Basically, it measures the bending of light when it travels from one medium to another