We know that scattering of light depends on its wavelength. The shorter the wavelength, the greater the scattering. The sky appears blue because blue light is extensively scattered. Why doesn’t the sky appear violet? After all, violet has the shortest wavelength in the visible spectrum and therefore it should be scattered the most

When white sunlight enters our atmosphere it is reflected in all directions by millions of tiny particles of dust or by water droplets. This is called scattering.

White light is made up of seven colours each of which has its own wavelength. The colours with the shortest wavelengths are at the blue end of the spectrum. They are scattered the most. The most scattered is violet which has the shortest wavelength in the visible spectrum.

However, we don’t see the sky as violet or indigo. This is because our eyes can see blue colour better than the other two colours.

Picture Credit : Google 

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