Wavelength is the __________

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BlackTom AI · Accepted Answer

Question restatement: Wavelength is the __________

Option 1: 'number of waves passing a fixed point in one second.' This describes frequency, not wavelength; frequency counts how many cycles occur per unit time, typically measured in hertz. Hence this option mixes up two distinct wave properties.

Option 2: 'height of the wave.' The height of a wave is amplitude, not wavelength. Amplitude measures the maximum displacement from rest, while wavelength pertains to spatial length between repeating points.

Option 3: 'distance between successive peaks in a wave.' This is the classic definition of wavelength: the spatial interval over which the wave pattern repeats, such as the distance from one crest to the next crest. It directly matches how wavelength is defined in wave physics.

Option 4: 'distance between a peak of one wave and the next trough.' This distance spans a half-cycle from crest to trough, which is not the standard measure of wavelength. The distance from peak to trough is half the wavelength for a sinusoidal wave, but wavelength itself is peak-to-peak (or trough-to-trough) spacing, not peak-to-trough.

In summary, option 1 confuses frequency with wavelength, option 2 identifies amplitude, option 4 describes half a cycle, while option 3 correctly captures the definition of wavelength as the distance between successive peaks (or successive troughs) in a wave.

Wavelength is the __________

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