JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Wave Nature and Interference of Light

  • question_answer
    Two sources of waves are called coherent if [NCERT 1984; MNR 1995; RPMT 1996, 97; CPMT 1997; UPSEAT 1995, 2000; Orissa JEE 2002;  RPET 2003; MP PMT 1996, 2004]

    A)            Both have the same amplitude of vibrations

    B)            Both produce waves of the same wavelength

    C)            Both produce waves of the same wavelength having constant phase difference

    D)            Both produce waves having the same velocity

    Correct Answer: C

    Solution :

               Two coherent source must have a constant phase difference otherwise they can not produce interference.


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