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| Ratio of Intensities at Maxima and Minima |
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| It has already been proved that the intensity of a wave is proportional to the square of the amplitude. At a point where constructive interference has occurred, the intensity will be maximum and the amplitudes of the two waves will have added. If A1 and A2 are the amplitudes of the individual waves, then |
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| Thus, during interference of waves in a medium, the intensity will not be constant. There will be certain points of maximum intensity and certain points of minimum intensity. In other words, there will be a redistribution of energy. The energy missing at one point, exactly reappears at another point and the total energy of the medium remains unchanged. |
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