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Q. Why does sun seems flat during sunrise and sunset?
Answer:-
The sun rays have to move through a larger atmospheric distance. The majority of the blue light and shorter wave lengths are removed by scattering. Merely red colour which is least scattered is received by our eyes as well as appear to come from sun. Therefore the appearance of sun at sunset or sunrise looks almost flat.
A radioactive substance has a half life of 1 min. If one nuclei decays now , when will be next decay????
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