Question

the SI unit of refractive index is

Answer 1

Answer:

it is unitless...................

Answer 2

Answer:

Unit of refractive index (μ) will be the ratio of the unit of speed of light in vacuum(c) to the speed of light in the given medium(v). As you can see, the unit of refractive is 1, which means the refractive index is just a number without any unit.