Question

which phrase correctly defines the amplitude of a wave? (1 point)
the vertical distance from the trough of a wave to the crest
the horizontal distance from the crest of one wave the the crest of the next wave
the horizontal distance from the trough of one wave to the trough of the next wave.
the vertical distance from the crest or trough of a wave to equilibrium

Explanation:

To determine the correct definition of wave amplitude, recall: Amplitude is the maximum displacement of a point on a wave from its rest (equilibrium) position. Analyze each option:

• First option: Distance from trough to crest is twice the amplitude (total vertical extent), not amplitude.
• Second option: Horizontal distance between crests is wavelength, not amplitude.
• Third option: Horizontal distance between troughs is also wavelength.
• Fourth option: Vertical distance from crest/trough to equilibrium matches the definition of amplitude.

Answer:

The vertical distance from the crest or trough of a wave to equilibrium