JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank EM Waves

  • question_answer
    An electromagnetic wave going through vacuum is described by \[E={{E}_{0}}\sin (kx-\omega \,t)\]; \[B={{B}_{0}}\sin (kx-\omega \,t)\]. Which of the following equation is true

    A)            \[{{E}_{0}}k={{B}_{0}}\omega \]                                     

    B)            \[{{E}_{0}}\omega ={{B}_{0}}k\]

    C)            \[{{E}_{0}}{{B}_{0}}=\omega k\]                                     

    D)            None of these

    Correct Answer: A

    Solution :

                       \[\frac{{{E}_{0}}}{{{B}_{0}}}=C.\] also \[k=\frac{2\pi }{\lambda }\] and \[\omega =2\pi \nu \]                    These relation gives \[{{E}_{0}}K={{B}_{0}}\omega \]


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