The blue colour of water in the sea is due to

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(C) The blue colour of water in the sea is primarily due to the scattering of light by water molecules.According to Rayleigh scattering,the intensity

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Scattering of blue light by water molecules

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(C) The blue colour of water in the sea is primarily due to the scattering of light by water molecules.According to Rayleigh scattering,the intensity of scattered light is inversely proportional to the fourth power of its wavelength,expressed as $I \propto \frac{1}{\lambda^4}$.Since blue light has a shorter wavelength compared to other colours in the visible spectrum,it is scattered more effectively by the water molecules,giving the sea its characteristic blue appearance.

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