Waves from two sources superpose on each other. At a particular point amplitude and frequency of...

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Waves from two sources superpose on each other. At a particular point amplitude and frequency of both the waves are equal. The ratio of intensities when both waves reach in the same phase and they reach with the phase difference of \( 90^{\circ} \) will be
a. \( 1: 1 \)
b. \( \sqrt{2}: 1 \)
c. \( 2: 1 \)
d. \( 4: 1 \)
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