Q: 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
(a)v/c
(b)c/v
(c)c/(2.v)
(d)(c − v)/c
Correct Answer: (b)
The correct answer is (a) 'v / c'. This question from the General Studies domain tests knowledge of Miscellaneous.