When two speakers are facing each other and producing a standing wave, the maxima occur at positions where the waves from both speakers constructively interfere. In this setup, assuming the speakers are identical and the waves have equal amplitudes, the intensity at each maximum will also be equal.
On the other hand, when speakers are facing away from each other, such as in the case of double slits, the interference pattern that forms is different. In the double-slit experiment with light waves, the waves passing through the two slits interfere with each other, creating an interference pattern on a screen or detector placed behind the slits.
In this situation, the intensity of the light at different points in the interference pattern can vary. The intensity depends on the constructive or destructive interference between the waves. Constructive interference occurs when the crests of the waves align, resulting in increased intensity at that point. Destructive interference occurs when the crests and troughs of the waves align, leading to decreased or zero intensity at that point.
The intensity variations in the interference pattern are a result of the superposition of waves with different phases. The phase difference between the waves determines whether they reinforce or cancel each other out at a given point.
Therefore, in the case of double slits, the maxima and minima in the interference pattern can vary in intensity due to the constructive and destructive interference of the waves.