Question

The refractive index of glass is 1.5. What is the speed

of light in glass? (Speed of light in vacuum is 3.0 ×108 m s-1)

A 1.2 × 10^8 m/s.

B 2.0 × 10^8 m/s.

C 2 × 10^7 m/s.

D 2.8 × 10^6 m/s.

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