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Two periodic waves of intensities `I_(1)` and `I_(2)` pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is:A. `(sqrt(I_(1))-sqrt(I_(2)))^(2)`B. `2(I_(1)+I_(2))`C. `I_(1)+I_(2)`D. `(sqrt(I_(1))+sqrt(I_(2)))^(2)` |
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Answer» Correct Answer - B `I=I_(1)+I_(2)+2sqrt(I_(1)I_(2))cos phi` `I_("max")=(sqrt(I_(1))+sqrt(I_(2)))^(2)` `I_("min")=(sqrt(I_(1))-sqrt(I_(2)))^(2)` `I_("max")+I_("min")` `(sqrt(I_(1))+sqrt(I_(2)))^(2)+(sqrt(I_(1))-sqrt(I_(2)))^(2)` `=(I_(1)+I_(2)+2sqrt(I_(1)I_(2)))+(I_(1)+I_(2)-2sqrt(I_(1)I_(2)))` `2(I_(1)+I_(2))` |
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