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Railways General Science & Technology Wave Optics / तरंग प्रकाशिकी Sample Paper Wave Optics Sample Test Paper-7

  • question_answer
    Assuming that universe is expanding, if the spectrum of light coming from a star which is going away from earth is tested, then in the wavelength of light

    A)  There will be no change

    B)  The spectrum will move to infrared region

    C)  The spectrum will seems to shift to ultraviolet side

    D)  None of above

    Correct Answer: B

    Solution :

    [b] Due to expansion of universe, the star will go away from the earth thereby increasing the observed wavelength. Therefore the spectrum will shift to the infrared region.


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