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  1. Which type of radiations are absorbed by the upper layer of the atmosphere?

    2. A.

     Radio-waves
    B.

     Infrared
    C.

     Visible
    D.

     Ultraviolet

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    Answer : Option D

    Explanation :

    The upper atmosphere derives most of its energy by direct absorption of solar electromagnetic energy in the ultraviolet and X-ray regions of the spectrum.

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