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    Question

    What is the reason for twinkling of

    stars?
    A Dispersion of light Correct Answer Incorrect Answer
    B Total internal reflection Correct Answer Incorrect Answer
    C Atmospheric reflection Correct Answer Incorrect Answer
    D Atmospheric refraction Correct Answer Incorrect Answer

    Solution

    Seismometers are instrument that measures motion of the ground, including those of seismic waves generated by earthquakes, volcanic eruptions and other seismic sources. Records of seismic waves allow seismologists to map the interior of the earth and locate and measure the size of these different sources. Seismograph is another Greek term meaning to draw siesmo waves.

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