A) \[\frac{\pi }{6}\]
B) \[\frac{2\pi }{3}\]
C) \[\frac{\pi }{4}\]
D) \[\frac{\pi }{3}\]
Correct Answer: B
Solution :
Superposition of waves does not alter the frequency of resultant wave and resultant amplitude Þ \[{{a}^{2}}={{a}^{2}}+{{a}^{2}}+2{{a}^{2}}\cos \varphi =2{{a}^{2}}(1+\cos \varphi )\] Þ \[\cos \varphi =-1/2=\cos 2\pi /3\]\\[\varphi =2\pi /3\]You need to login to perform this action.
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