Question

write the untis of refractive index​

Answer 1

Explanation:

refractive index have no si units, since from the definition refractive index is the ratio of velocity of light in a material divided with velocity of light in vacuum.

Answer 2

$\huge\frak\pink{answer}$

refractive index have no si units, since from the definition refractive index is the ratio of velocity of light in a material divided with velocity of light in vacuum.