NEET Sample Paper NEET Sample Test Paper-70

  • question_answer
    Two coherent sources have intensity in the ratio of\[\frac{100}{1}\]. Ratio of (intensity) max/intensity) min is

    A) \[\frac{1}{100}\]                    

    B) \[\frac{1}{10}\]

    C) \[\frac{10}{1}\]                                  

    D) \[\frac{3}{2}\]

    Correct Answer: D

    Solution :

    \[\frac{{{I}_{1}}}{{{I}_{2}}}=\frac{100}{1}\] Now \[\frac{{{\operatorname{I}}_{max}}}{{{\operatorname{I}}_{min}}}={{\left( \frac{\sqrt{\frac{{{I}_{1}}}{{{I}_{2}}}}+1}{\sqrt{\frac{{{I}_{1}}}{{{I}_{2}}}}-1} \right)}^{2}}={{\left( \frac{\sqrt{100}+1}{\sqrt{100}-1} \right)}^{2}}=\frac{121}{81}=\frac{3}{2}\]


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