Question

define refraction index​

Answer 1

heya mate......✌

Answer:

• Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. ...

• Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.

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Answer 2

The ratio of the speed of light in a vacuum to the speed of a given medium is known as refractive index