Question

what is refrection ? define refrective index and Wrile its SI unit​

Answer 1

Answer:

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium. The index of refraction does not have units. It is the ratio of the speed of light in various mediums so the units cancel out.

Explanation:

Answer 2

Answer:

refraction is the change in the direction of a wave passing from one medium to another is called refraction.

refractive index is also the index of refraction describes how fast the light travels through the material.

it doesn't have SI units.

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