Railways General Science & Technology Ray Optics Sample Paper Ray Optics Sample Test Paper-6

  • question_answer
    Twinkling of a star is due to

    A)  Atmospheric refraction of sunlight

    B)  Atmospheric refraction of starlight

    C)  Lightening in the sky

    D)  None of these

    Correct Answer: B

    Solution :

    [c] The star is considered to be a point source of light for its distance from the earth. Apparent change in position of its image due to atmospheric refraction causes twinkling of stars.


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