J & K CET Engineering J and K - CET Engineering Solved Paper-2003

  • question_answer
    An electromagnetic radiation of wavelength \[\lambda ,\] frequency v and propagating in air with velocity v is incident on a glass plate and is transmitted through. Which of the following statement is true for the wave inside the glass plate?

    A)  The velocity v remains unchanged but \[\lambda \]changes

    B)  The frequency v and wavelength remain unchanged but v changes

    C)  The wavelength \[\lambda \] remains unchanged but velocity v changes

    D)  The frequency v remains unchanged but \[\lambda \]changes

    Correct Answer: D

    Solution :

    The electromagnetic radiation when incident on glass plate is transmitted through it, this is  known as refraction. Refraction is basically the  change in direction of a wave due to a change  in its velocity. This is most commonly see when a light wave passes from one medium to another. At the boundary between the media, the wave's phase velocity is altered, it changes direction and its wavelength increases or decreases but its frequency remains constant.


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