Light enter from air into glass having refractive index 1.50. what is the speed of light in glass ? The speed of light in vacuum is 3×10m/s
Given, speed of light c = 3 x 10^8 m/s
refractive index of glass ng = 1.50
speed of light in glass vg= ?
We know that, ng = c/vg
therefore, vg = c/ng
= 3 x 10^8/1.5
= 2 x 10^8 m/s
Thus, speed of light in the glass is 2 x 10^8 m/s.
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