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Two coherent monochromatic light beams of intensities I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are |
5I and I 5I and 3I 9I and I 9I and 3I |
9I and I |
$I_{\max }=\left(\sqrt{I_1}+\sqrt{I_2}\right)^2=(\sqrt{I}+\sqrt{4 I})^2=9 I$ $I_{\min }=\left(\sqrt{I_1}-\sqrt{I_2}\right)^2=(\sqrt{I}-\sqrt{4 I})^2=I$ |
