Question

A ray of light travels from a medium of refractive index 1.2 to a medium of refractive index 1.6. What is the ratio of velocity of light in first medium to the velocity of light in second medium?
(a) 4:3
(b) 3:2
(c) 1:2
(d) 3:4​

Answer 1

a 4:3

refractive index is equal to velocity of light in vaccume divided by velocity of light in medium.