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Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 x 108 ms-1. |
| Answer» N :- =>Refractive index of a medium (nm) = SPEED of light in vacuum/Speed of light in the medium=>Speed of light in vacuum (c) = 3 × 108 m/s=>Refractive index of GLASS (ng) = 1.50=>Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass= c/ng=3 × 108/1.50 = 2X 108 ms-1.Therefore, the speed of light in the glass is 2×108ms-1. | |