Question

What is the speed of light in a medium with an index of refraction n=1.50?1.50x108m/s4.50x108m/s5.00x107m/s2.00x108m/s

Answer 1

Refractive index (n) of a medium is given by

$n=\frac{c}{v};$

Here n= refractive index;

c= speed of light in vaccum

v= speed of light in medium.

According to problem

$\begin{gathered} n=\frac{c}{v}\begin{cases}c={3\times10^8}\frac{m}{s} \\ n={1.50}\end{cases} \\ \\ \therefore\text{ 1.50=}\frac{3\times10^8}{v} \\ \therefore v\text{ = }\frac{3\times10^8}{1.50}=\text{ 2}\times10^8m\text{ /s;} \end{gathered}$

Final answer is

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