Question

You are given kerosene, turpentine and water. In which of these does
the light travel fastest? Use the information given in Table 10.3.

Answer 1

Of all the three materials, water is the least refractive.Therefore, light travels fastest in water.

hope it helps......:))

Answer 2

Answer=

Refrective index of water =1.33

Refrective index of kerosene =1.44

Refrective index of Turpentine =1.47

Hence,

Optical density of Turpentine is maximum so light travel with minimum speed so,

Speed of light maximum in water then kerosene then minimum in Turpentine

Hope it is helpful....

Best of luck for board.....