Question

What is the index of refraction of a material in which the speed of light is 7.50% slower than the speed of light in vacuum?

Answer 1

Answer:

The value is $n = 1.081$

Explanation:

From the question we are told that

   The speed of in a vacuum is $c = 3.0 *10^{8} \ m/s$

    The speed of light in the material is  $v = c -0.075c = 0.925 c = 0.925 * 3.0*10^{8} = 2.775 *10^{8} \ m/s$

   Generally the reflection of the material is mathematically represented as

             $n = \frac{c}{v}$

=>    $n = \frac{3.0*10^{8}}{2.775 *10^{8}}$

=>    $n = 1.081$