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EAMCET Medical EAMCET Medical Solved Paper-2006

  • question_answer
    Two coherent monochromatic light sources are located at two vertices of an equilateral triangle. If the intensity due to each of the sources independently is 1 Wm-2 ) at the third vertex, the resultant intensity due to both the sources at that point (i.e., at the third vertex) is: \[(in\text{ }W{{n}^{-2}})\]

    A)  Zero                                     

    B)  \[\sqrt{2}\]

    C)   2                                           

    D)  4

    Correct Answer: D

    Solution :

                     \[{{I}_{1}}={{I}_{2}}=1\,W{{m}^{-2}}\] So, resultant intensity at third vertex                  \[I={{(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})}^{2}}\] \[={{(\sqrt{1}+\sqrt{1})}^{2}}={{(1+1)}^{2}}=4\,W{{m}^{-2}}\]


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