Question

Determine the refractive index for a material when the speed of light in that material is 35000000 m/s. Answer to 1 decimal places.

Answer 1

Given, that speed of light in a certain medium is $v=3.5\times10^7m/s$

Since, refractive Index is defined by

$$\mu=\frac{c}{v}\implies \mu=\dfrac{3\times 10^8}{3.5\times 10^7}\approx8.6$$