JEE Main & Advanced Sample Paper JEE Main Sample Paper-19

  • question_answer For Doppler's effect, which of the following is a correct statement
    (I) During observer motion both frequency and wavelength will change
    (II) During source motion both frequency and wavelength will change
    (III) During source motion only frequency will change
    (IV) During observer motion only frequency will change

    A)   I, II                            

    B)  I, II

    C)  II, III                           

    D)  II, IV

    Correct Answer: D

    Solution :

     (Source) motion\[\lambda \], n both change, (Observer) motion only n change.

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