Standing waves can be said to be due to “interference in space," whereas beats can be said to be due to "interference in time." Explain.
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When two or more waves having same frequency come across, standing waves occur. In the picture above, the red and the blue waves have the same frequency and moving in opposite direction. The interference of them produces the black one, that is standing wave. Every elements of the standing wave have certain amplitude depends on its location in space so standing waves are called interference in space.
The superposition of the two waves gives the standing wave
The ``2Asinkx`` part of the standing wave equation shows that the amplitude is function of x. The amplitude change with x.