McqMate
| Q. |
The sky appears blue because of – |
| A. | Atmospheric water vapour |
| B. | Scattering of light |
| C. | Reflection on sea water |
| D. | Emission of blue wavelength by the sun |
| Answer» B. Scattering of light | |
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Explanation: The sky is blue because the molecules in the air scatter light in the higher wavelengths (that is, the blue light), while lower wavelength light (that is, the light on the red end of the spectrum) goes through to the ground. So the light that get finally reflected down from the scattering is blue, therefore a blue sky. This is called Rayleigh scattering. |
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