Question

A reflective index of water is 1.33 and the speed of light is 3 into 10to the power 8 .what is the speed of light in water

Answer 1

Answer:

Explanation:

It is denotes as n = c / v, v = c / n= 3 × 10^8 m/s / (1.33) = 2.25 × 10^8 m/s. Therefore, refractive index of the water can be measure by the Speed of light in water is 2.25 × 10^8 m/s

Answer 2

Answer:

Explanation:

First of all it is not reflective index, it it refractive index.

Now, by definition, refractive index of a medium = Speed of light in vacuum /Speed of light in that medium

So speed of light in water will be = Speed of light in vacuum/ refractive index of water =( 3×10∧8)/1.33 = 2.26×10∧8 (approximately)