# 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 vaccum is 3 x 10^8 ms^-1

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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 vaccum is 3 x 108 ms-1

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Refractive index, nm

$\frac{\textit{Velocity of light in vaccum}}{\textit{Refractive Index of glass}}$

$\frac{3\times 10^8}{1.50}$

= 2 x 108 m/s

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