Question

(v) The absolute refraction index
(A) is expressed in dioptre (B) is expressed in m/s
4
(D) has no unit
3
(C) of air is about​

Answer 1

Answer:

The option is D

Explanation:

it's answer l hope this answer help you

Answer 2

The absolute refraction index has no unit (option-D).

• The speed of light in a vacuum per unit speed of light within the medium is called the absolute refractive index of that medium.
• It is denoted as "μ".

• speed is expressed in meter/second or "m/s".
• μ = speed of light in vacuum/speed of light in the medium

           = (m/s) / (m/s)

           = 1         ⇒ this implies μ is without any unit.

• Therefore, μ is the unitless or dimensionless quantity.