Question

what is wavelength?
the height of a wave
the distance from one wave peak to the next
the lowest point of a wave
a logarithmic unit of sound intensity
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Explanation:

To determine the correct definition of wavelength, we analyze each option:

• "the height of a wave" refers to amplitude, not wavelength.
• "the distance from one wave peak to the next" matches the definition of wavelength (the spatial period of a wave, the distance over which the wave's shape repeats, often measured from peak to peak or trough to trough).
• "the lowest point of a wave" is the trough, not wavelength.
• "a logarithmic unit of sound intensity" is decibel, not related to wavelength.

Answer:

the distance from one wave peak to the next