Physics

Problem

Blue light travels at

3.0 \times 10^8 \text{ ms}^{-1}

in the air. Which one of the following correctly gives its velocity in water, whose refractive index is 1.33? a.

1.0 \times 10^8 \text{ ms}^{-1}

2.26 \times 10^8 \text{ ms}^{-1}

2.33 \times 10^8 \text{ ms}^{-1}

3.0 \times 10^8 \text{ ms}^{-1}