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Superposition of Waves — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsSuperposition of Waves2 Marks
Question
Two interfering waves of the same frequency are in phase but have different amplitudes $A_1$ and $A _2$. What can you say about the intensity of the resultant wave?
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Answer

The two waves interfere in phase. Thus, the amplitude and hence the intensity of the resultant wave is maximum, $I_{\max } \propto\left(A_{\min }\right)^2$ where $\left(A_{\max }\right)^2=\left(A_1+A_2\right)^2$.

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