Which statement correctly describes a trough in a wave?

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Multiple Choice

Which statement correctly describes a trough in a wave?

Explanation:
Think about a wave oscillating around its equilibrium position. The highest point is a crest, and the lowest point between two crests is a trough. So a trough is the lowest displacement reached between successive crests. It’s not about the distance from crest to crest (that’s the wavelength), and it’s not the maximum displacement (that’s a crest). The trough corresponds to the downward extreme of the wave’s oscillation, the lowest point in that passage.

Think about a wave oscillating around its equilibrium position. The highest point is a crest, and the lowest point between two crests is a trough. So a trough is the lowest displacement reached between successive crests. It’s not about the distance from crest to crest (that’s the wavelength), and it’s not the maximum displacement (that’s a crest). The trough corresponds to the downward extreme of the wave’s oscillation, the lowest point in that passage.

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