SSC General Science & Technology Sample Paper NCERT Sample Paper-2

  • question_answer
    The sun appears deep orange-red before it sets because:

    A)  It emits only orange-red light

    B)  It is hotter at the end of the day

    C)  Its light has to traverse a thicker atmosphere, therefore other colour get scattered and do not react us

    D)  It contains more helium in the evening

    Correct Answer: C

    Solution :

    [c] In the mornings and evenings, when the sun is near the horizon, the rays have to travel longer path in the atmosphere to reach us than it does in the noon. The dust, smoke and water vapour present in the atmosphere scatter away these colours differently. Violet, indigo and blue are scattered most and red and orange are scattered least. That is why most of these two colours reach our eyes. As a result, the rising and setting sun appears deep orange-red.

You need to login to perform this action.
You will be redirected in 3 sec spinner