Question

The blue colour of the water of the sea is due to:

• A. reflection of blue light by salts present in water
• B. scattering of blue light by sol particles
• C. refraction of blue coloured light by the impurities present in seawater
• D. absorption of radiation of different colours except blue light

Answer 1

The correct option is B scattering of blue light by sol particles

The water of sea is not blue but because of Rayleigh scattering, Particles and dissolved substances, depending on their size and physical properties (including the type of molecular bonds), will scatter or absorb visible light at different wavelengths and actually change the color of the water.
Therefore, the blue colour of the water of the sea is due toscattering of blue light by sol particles.
Thus option B is correct.