Question

reflective indices of kerosene t u r p e n t i n e and water are 1.44 1.47 and 1.33 respectively through which of these medium light travels faster and explain​

Answer 1

Refractive Index is a constant
for a particular material and is an indicator of the speed of light in the
given material. The lower the value of the refractive index, faster the speed
of light. Vacuum has a refractive index of 1 and light travels at a speed of
300,000,000 metres per second in it.
The refractive Index (n) is calculated as follows:
 
n = speed of light in vacuum / speed of light in the medium
 
Lower the value, faster the speed of light in the medium.
 Since turpentine has the largest
value of RI, light will travel the slowest in it. On the other hand, water has
a lower RI and will allow light to pass through it at a speed greater than that
in either kerosene or turpentine