Blue light travels at in air

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

Blue light travels at

3.0\times10^8\text{ m/s}

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

1.33

? (1)

1.0\times10^8\text{ m/s}

(2)

2.26\times10^8\text{ m/s}

(3)

2.33\times10^8\text{ m/s}

(4)

3.0\times10^8\text{ m/s}