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  1. In the absence of the earth's atmosphere, sky would appear

  2. A.

     Blue

    B.

     Deep red

    C.

     White

    D.

     Black

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    Answer : Option D

    Explanation :

    Without an atmosphere the sky appears black, as evidenced by the lunar sky in pictures taken from the moon. But even a black sky has some lightness. At night, the sky always has a faint color, called "skyglow" by astronomers.


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