Question

The refractive index of a material is 1. If the speed of light in vacuum is 3 × 10⁸ ms^-1 then the speed of light in that material is ………………..

 A) 0.3 × 10⁸ m/s 

B) 3 × 10⁸ m/s 

C) 4 × 10⁸ m/s 

D) 10⁸ m/s

Answer 1

B) 3 × 10⁸ m/s