Why do clouds appear white ?

The sunlight's visible spectrum is composed of different colours having different wavelengths, which when come together appear as white. The clouds are cornposed of millions of tiny round water droplets which are large enough to scatter all the wavelengths of the visible spectrum of sunlight. All the colours are reflected equally in random directions. So, the light that reaches our eyes contains all the wavelengths in equal proportions and thus appear as white making the clouds look.

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