Question

What is Refractive index??​

Answer 1

ANSWER :-

Definition of Refractive index-

The ratio of Sine of angle of Incidence to the Sine of angle of Refraction is a constant for the light of a given colour and for the given pair of media. This constant value is called the Refractive Index of the second medium with respect to the first medium and This is also called as Snell's Law.

$\frac{\sin(i) }{sin(r)} = constant \:$

If the first medium is air then this refractive index is known as absolute refractive index of the second medium.

The absolute Refractive Index of a medium is expressed by -

$n 2 = \frac{velociy \: of \: light \: in \: free \: space \: }{velociy \: of \: light \: in \: \: medium}$

Answer 2

Answer:

optics, the refractive index 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 medium. Wikipedia

Explanation:

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