Question

The blue colour of the water in the Sea is due to

• A. Refraction of the blue light by the impurities in Sea water
• B. Reflection of the blue sky by Sea water
• C. Scattering of blue light by water molecules
• D. Absorption of other colours except the blue colour by water molecules
• E. Blue colouring of the Sea water

Answer 1

The correct option is C Scattering of blue light by water molecules

Blue colour of water in sea is due to scattering of light by water molecules.

As blue has smaller wavelength, therefore scattering of blue is very large.

We know,

scattering probability is directly proportional to $\frac{1}{{\lambda }^4}$