CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q21

The refractive index of water is 1.33. What will be the speed of light in water?

1. (A)3.0 \times 10^8\text{ m s}^{-1}
2. (B)2.26 \times 10^8\text{ m s}^{-1}
3. (C)4.0 \times 10^8\text{ m s}^{-1}
4. (D)1.33 \times 10^8\text{ m s}^{-1}