If the speed of light in air is represented by c and the speed in a medium is v, then the refractive index of the medium can be calculated using the formula
v / c
c / v
c / (2. v)
(c - v) / c
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2020
The refractive index (n) of a medium is a dimensionless quantity that describes how fast light travels through the medium. It is defined as the ratio of the speed of light in vacuum (c₀) to the speed of light in the medium (v). Air is often used as an approximation for vacuum, so if the speed of light in air is represented by c and the speed in the medium is v, the refractive index is given by n = c / v.