Question

define refractive index ??????​

Answer 1

Answer:

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as where c is the speed of light in vacuum and v is the phase velocity of light in the mediumthe ratio of the velocity of light in a vacuum to its velocity in a specified medium.

Answer 2

$\underline \mathbb{REFRACTIVE\:INDEX}$

• The extent of the change in direction that take place in a given pair of media is expressed in terms of the reflective inbex.

• The refractive index of a medium with respect to vacuum is called absolute refractive index of the medium . The absolute refractive index of a medium is simply called its refractive index.

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