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

  • question_answer
    In a medium sound travels 2 km in 3 sec and in air, it travels 3 km in 10 sec. The ratio of the wavelengths of sound in the two media is                                                             [NTSE 1995]

    A)            1 : 8                                          

    B)            1 : 18

    C)            8 : 1                                          

    D)            20 : 9

    Correct Answer: D

    Solution :

               \[v\propto \lambda \]Þ \[\frac{{{\lambda }_{1}}}{{{\lambda }_{2}}}=\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{2/3}{3/10}=\frac{20}{9}\]


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