SSC Geography Sample Paper NCERT Sample Paper-1

  • question_answer
    Consider the following statements:
    1. Ionosphere deflects long wave, medium wave and short wave radio waves and help in radio transmission.
    2. Ionosphere is the layer of convection currents
    Which of the above statements is/are correct?

    A)  1 only 

    B)  2 only

    C)  Both 1 and 2    

    D)  neither 1 nor 2

    Correct Answer: A

    Solution :

    [a] Ionosphere is very helpful in radio transmission as it deflects radio waves. Ionosphere is divided into three different layers known as D, E and F layers. The lowest layer is D which reflects long radio waves. Above the 'D' layer is the 'E' layer which deflects medium radio waves and above both D and E is the F layer which deflects short radio waves. Convection currents are not found in ionosphere, rather these currents are active in troposphere.

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