Question

7. Slunit of refractive index is​

Answer 1

Answer:

There is no SI units for refractive index, since it is a ratio of light velocity in material vs light velocity in vacuum, all velosity units have been cancelled out and the only thing left is the number that shows the ratio.

Explanation:

I hope it is right

Answer 2

Answer:

Because refractive index is a ratio of light velocity in a material versus light velocity in vacuum, all velocity units have been wiped out, leaving only the value that represents the ratio.

Explanation:

• Because the refractive index is the ratio of the speed of light within the material of interest divided by the speed of light in a vacuum, the units of measurement (metres per second, kilometres per second, etc.) cancel out, leaving only a single value known as the index of refraction.