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• Topic:

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Two periodic waves of intensities  pass through a region at the same time in the same direction. The sum of the maximum and  minimum intensities is

(a) ${I}_{1}+{I}_{2}$

(b) ${\left(\sqrt{{I}_{1}}+\sqrt{{I}_{2}}\right)}^{2}$

(c)${\left(\sqrt{{I}_{1}}-\sqrt{{I}_{2}}\right)}^{2}$

(d)

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