NEET Sample Paper NEET Sample Test Paper-70

  • question_answer
    If the amplitude ratio of two sources producing interference is \[3\, :\, 5\], the ratio of intensities at maxima and minima is

    A) \[25: 16\]                     

    B) \[5:3\]

    C) \[16: 1\]                       

    D) \[25:9\]

    Correct Answer: C

    Solution :

    \[\frac{{{a}_{1}}}{{{a}_{2}}}=\frac{3}{5}\] \[\therefore \,\,\,\,\,\,\frac{{{\operatorname{I}}_{max}}}{{{\operatorname{I}}_{min}}}=\frac{{{\left( {{a}_{1}}+{{a}_{2}} \right)}^{2}}}{{{\left( {{a}_{1}}-{{a}_{2}} \right)}^{2}}}=\frac{{{\left( 3+5 \right)}^{2}}}{{{\left( 3-5 \right)}^{2}}}=\frac{16}{1}\]


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