Question

In which of the given media light travels more fast. Why
medium refractive index
Water 1.33
Ice 1.31
Alcohol 1.36
Plzzz helpp fast!!!!!!!!

Answer 1

light travels faster in optically rarer medium• out of the given medium ; we have the refractive index of ice which is lowest than the other• two given has the light will travel fastest in ice

Answer 2

Answer: The light travels fastest in Ice.

Explanation:

Refractive index is defined as the ratio of speed of light in vacuum to the speed of light in the medium.

Mathematically,

$\eta=\frac{\text{Speed of light in vacuum}}{\text{Speed of light in medium}}$

From the above relation, speed of light in medium is inversely proportional to the refractive index. More the refractive index, less will be the speed and the light will travel slower and vice-versa.

From the given refractive indexes, the speed of light will be fastest in the medium having lowest refractive index. The refractive index is lowest for Ice and the speed of light is fastest in this medium.

Hence, the light travels fastest in Ice.