Four harmonic waves of equal frequencies and equal intensities I 0 have phase angles 0, 
, 
and π. When they are superposed, the intensity of the resulting wave is nI 0 . The value of n is:
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION
(3)
I 0 ∝ A 2 Let amplitude of individual wave be A then amplitude of resulting wave 2A cos 
= 
I = 3I 0
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