Question

Why does refractive index has no units ?

Answer 1

✔️✔️️Refractive index of a medium is defined as:-

⭕️It’s unitless quantity.

⭕️It is the ratio of speed of light in medium to speed of light in vacuum.


➖➖➖➖⏹OR ⏹➖➖➖➖

⭕️ the ratio of free space velocity of light(c) to the velocity of the light in that medium(n).

⭕ refractive index(n)=c/v.

⭕️As it is a ratio of same physical quantity(velocity) it has no unit.

⭕️Refractive index has no units because the refractive index is the ratio of the speed of light within the material.

⭕️ where all the parameters get cancelled out and only left with just a number know as the index of refraction. !!!

Answer 2

HEY MATE HERE IS YOUR ANSWER



The refractive index has no units because the units cancel out when calculating the value. The refractive index is calculated by dividing the speed of light in a vacuum by the speed of light in the new medium. Since both of these values have the units meters per second (m/s), the units cancel out and there is no overall unit for the refractive index.





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