Question

Explain refractive index in 25 to 30 words?

Answer 1

Refractive index:. a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction) or the ratio of the speed of light in a specified medium to that in the given medium (relative index of refraction) Symbol: n.

hope this helps you....:)

Answer 2

HELLO DEAR,


A MEASURE OF THE EXTEND TO WHICH

RADIATION IS PASSING THROUGH THE

INTERFACE BETWEEN TWO MEDIAN.

IT IS THE RATIO OF THE SIN OF ANGLE OF


INCIDENT TO THE SIN OF THE ANGLE OF

REFRACTION , WHICH CAN BE SHOWN TO


BE EQUAL TO THE RATIO OF THE PHASE


SPEED IN THE FIRST MEDIAN TO THAT IN

THE SECOND.


INTHISCASEOF ELECTROMAGNETIC 
RADIATION, ESP LIGHT,


IT IS USUAL TO GIVE VALUES OF

THE ABSOLUTE REFRACTIVE INDEX Of A

MEDIUM, THAT IS FOR

RADIATION ENTERING THE MEDIUM

FROM FREE SPACE

. Symbol: ν, μ

I HOPE ITS HELP YOU DEAR,
THANKS