If the speed of light in air is 3 x 10^{8} m/s, the speed of light in glass (with refractive index 1.5) would be

- 4.5 x 10
^{8}m/s - 1.5 x 10
^{8}m/s - 2 x 10
^{8}m/s - 3 x 10
^{8}m/s

**Answer**

Refractive index of glass with respect to air = 1.5

1.5 = Speed of light in air / Speed of light in glass

Speed of light in glass = 3 x 10^{8} / 1.5 = 2 x 10^{8} m/s

**The correct option is C.**