Question

The refractive index is the ratio between the speed of light in air or vacuum and ___​

Answer 1

Answer:

Simply:

The speed of light in the given medium(v)

Answer 2

Answer:

The refractive index is ratio of the speed of light in a vacuum to the speed of the light in the medium.

• The refractive index is a common phenomenon, in which a light ray changes its direction or bending of the light ray when it travels from one medium to another medium.

• The value of the refractive index changes with change medium to medium.
• When one of the two mediums is a vacuum, then the refractive index of the second medium with respect to the first medium is called Absolute Refractive Index.
• It is denoted by 'n'.
• Therefore, n = (Speed of Light in Vacuum)/(Speed of light in any medium).
• The refractive index of water is 1.33. It means that the speed of light in water is 1.33 times lesser than that of in a vacuum.

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