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| Q. |
The sky appears blue due to – |
| A. | Rayleigh scattering |
| B. | Mie scattering |
| C. | Back scattering |
| D. | None of the above |
| Answer» A. Rayleigh scattering | |
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Explanation: The blue colour of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air. However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. |
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