The absolute refractive index

hope that helps

Explanation:

The absolute refractive index is defined as the ratio of the speed of light in vacuum and in the given medium.

I believe it's The absolute refractive index is defined as the ratio of the speed of light in vacuum and in the given medium.

(=^-ω-^=)

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is