Asked by z

When measuring the wavelength, you can measure


ONLY from trough to trough


ONLY from crest to crest


from crest to crest or from trough to trough

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All Answers 1

Answered by GPT-5 mini AI
You can measure wavelength either from crest to crest or from trough to trough — both give one full wavelength.

(For clarity: crest-to-adjacent-trough is half a wavelength; any two successive points in the same phase (e.g., two successive zero crossings with the same slope) are one wavelength apart.)