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| Q. |
In the absence of the earth's atmosphere, sky would appear – |
| A. | blue |
| B. | deep red |
| C. | white |
| D. | black |
| Answer» D. black | |
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Explanation: Sky appears blue because the tiny particles of the earth's atmosphere scatter the blue colour (short wavelength) of the sunlight more dominantly than other wavelengths. A blue sky is a manifestation of Rayleigh scatter. The sky would appear black in the absence of earth's atmosphere because there would be no particles to scatter the light. |
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