Question
The intensity maxima due to two interfering waves of equal amplitude $a_1=a_2=a$ is $4 a^2$. Does this violate the law of conservation of energy? Justify.
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Answer
No, The average intensity of maxima and minima will be, $\text{I}_{\text{av}}=\frac{4\text{a}^2+0}{2}=2\text{a}^2,$ which is the sum of their intensities.
So, energy conservation is obeyed, but redistribution of energy has taken place.
So, energy conservation is obeyed, but redistribution of energy has taken place.
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