Three waves of amplitudes 7 mm, 3 mm and 11 mm with a successive phase difference of 
are super imposed. The amplitude of the resulting wave will be
Text Solution
Verified by ExpertsThe correct answer is:
A
Let us say that the first wave has a zero phase, then the second one is ahead of the first by a phase of 
and so the third one is ahead of the first one by a phase of 
. So the first and the third are opposite to each other. Hence,
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