Why sky see blue?
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Yogita Ingle 5 years, 8 months ago
The molecules of air and other fine particles in the atmosphere have a size smaller than the wavelength of visible light. Thus, they are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end.
Red light has a wavelength greater than blue light. Thus, when sunlight passes through the atmosphere, the fine particles in air scatter blue colour (shorter wavelengths) more strongly than red. The scattered blue light enters our eyes.
If the Earth had no atmosphere, then there would not have been any scattering. The sky would have looked dark. Similarly, the sky appears dark to aeroplane passengers flying at very high altitudes, as scattering is not prominent at such heights.
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