Respuesta :
In order to determine the wavelength, you must know the crest of one wave to the crest of the next wave
What is wavelength ?
Wavelength is the distance between identical points (adjacent crust ) in the adjacent cycle of a waveform propagated in space or along wire .
wavelength can be determined by two methods
1) distance between crest and trough of that wave
2) distance between crest of one wave to the crest of the next wave or
distance between trough of one wave to the trough of the next wave
so , the correct answer will be d)the crest of one wave to the crest of the next wave
learn more about Wavelength
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