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=(c)/(v);`

Here n= refractive index;

c= speed of light in vaccum

v= speed of light in medium.

According to problem

`\begin{gathered} n=(c)/(v)\begin{cases}c={3*10^8}(m)/(s) \\ n={1.50}\end{cases} \\ \\ \therefore\text{ 1.50=}(3*10^8)/(v) \\ \therefore v\text{ = }(3*10^8)/(1.50)=\text{ 2}*10^8m\text{ /s;} \end{gathered}`

Final answer is