JEE Main & Advanced Physics Wave Mechanics Question Bank Basics of Mechanical Waves

  • question_answer
    If wavelength of a wave is \[\lambda =6000{AA}.\] Then wave number will be                                  [MH CET 2002]

    A) \[166\times {{10}^{3}}\] m?1

    B) \[16.6\times {{10}^{-1}}\] m?1

    C) \[1.66\times {{10}^{6}}\] m?1

    D) \[1.66\times {{10}^{7}}\] m?1

    Correct Answer: C

    Solution :

    \[\bar{n}=\frac{1}{\lambda }=\frac{1}{6000\times {{10}^{-10}}}\]\[=1.66\times {{10}^{6}}{{m}^{-1}}\]


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