UPSC Geography The origin and evolution of the earth Question Bank Universe / Sun / Planets / Earth

  • question_answer The waves that help scientists to understand the internal structure  of the Earth are [NDA 2012-II]

    A)  primary waves

    B)  secondary waves

    C)  surface waves

    D)  longitudinal waves

    Correct Answer: B

    Solution :

     Secondary waves (S waves) are the second fastest travelling seismic waves (after primary waves) and can travel through solids but not through liquids or gases. It helps scientists to understand the internal structure of the Earth.

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