Question

Write Rayleigh's Law for scattering of light. Using this law explain the blue color of sky.​

Answer 1

Answer:

Answer is here:-

It is this scattered light that gives the surrounding sky its brightness and its color. As previously stated, Rayleigh scattering is inversely proportional to the fourth power of wavelength, so that shorter wavelength violet and blue light will scatter more than the longer wavelengths (yellow and especially red light).

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Answer 2

Scattering of light:

When light wave paases through the atmosphere, it is absorbed by the molecules of air,these molecules further emit visible radiation in all directions and this phenomenon is called scattering of light.

According to Rayleigh ,the intensity of light scattered is inversely proportional to the fourth power of the wavelength of incident light .Hence, larger the wavelength, less is the intensity of scattered light. For this reason, red light is scattered the least while the violet, indigo or blue scatter more.

Blue colour of the sky:

Rays of the sun travel a long distance through the atmosphere before comming to the earth's surface. Small dust particles and molecules of gas present in the atmosphere cause scattering of this light. As the wavelength of red light is greater than the other lights in the visible spectrum ,scattering of red light is less. But for blue or violet lights, scattering is more as the wavelength of these lights is less. Our eyes are more sensitive to blue light than violet, and so the sky appears blue to us.

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