Question

You are given kerosene, turpentine and water. In which of these does light travel the fastest? (refractive index of given substances as: kerosene n = 1.44, turpentine n = 1.47, water n = 1.33)

Answer 1

n=c/v
Refractive index =n
c = velocity in empty space
v= Velocity in substance

v=c/n
speed order=water>kerosene>turpentine

I hope it is correct

Answer 2

Explanation:

given kerosine =1.44, turpentine =1.47 ,water=1.33

lights travel the fastest in a medium Having minimum optical density of lower refractive index

since,

water=1 .33 is the lowest speed of a light is maximum in water