RAJASTHAN PMT Rajasthan - PMT Solved Paper-2003

  • question_answer
    Which one of the following happens when light ray enters from air to a glass slab?

    A)  Wavelength increases

    B)  Wavelength decreases

    C)  Frequency increases

    D)  Frequency decreases

    Correct Answer: B

    Solution :

    When a tight ray enters from air to glass, its   frequency   remains   unchanged, velocity (in denser medium) decreases; so wavelength\[\lambda =\frac{\upsilon }{n}\] decreases.


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