Trough – the lowest point below the rest position. Amplitude – the maximum displacement of a point of a wave from its rest position. Wavelength – distance covered by a full cycle of the wave. Usually measured from peak to peak, or trough to trough. Time period – the time taken for a full cycle of the wave.

What is a trough in a wave?

The highest surface part of a wave is called the crest, and the lowest part is the trough. ... The horizontal distance between two adjacent crests or troughs is known as the wavelength.

What is crest and trough in physics?

A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.