2020 · Q11
If the speed of light in air is 3 × m/s, then the speed of light in a medium of refractive index is. 108 ×108
General KnowledgePhysics
- A2 × m/s
- Bm/s ×108 108
- Cm/s
- D3 × m/s
Explanation
The speed of light in a medium is given by v = c/n, where c is the speed in vacuum and n is the refractive index. With c = 3 x 10^8 m/s and n = 1.5, v = 2 x 10^8 m/s. Hence A.