Trough
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Example:
Imagine you're trying to find the best time to shop in a busy supermarket to avoid the crowds. This scenario is similar to identifying the trough in a transverse wave, which is the lowest point just like finding the least busy shopping time. Just as you look for the lull in shopper activity to enjoy a quieter experience, the trough represents the point in the wave where the energy is at its lowest, akin to the supermarket being at its emptiest.
Practice Version
Trough: The lowest part on a transverse wave. Trough. The trough is the point on the wave where the displacement of the medium is at its minimum.