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Question

Which coloured light scatters least by fog and smoke?


A
Green
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B
Yellow
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C
Blue
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D
Red
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Solution

The correct option is C Red
The color of the scattered light depends on the size of the scattering particles. The molecules of air and other fine particles in the atmosphere have sizes smaller than the wavelength of visible light. Red color light has a maximum wavelength and hence is scattered the least.

Physics

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