Question at position 27 Wavelength is the distance from the crest to the trough of the same wave.TrueFalse单项选择题
A
True
B
False

Question

Question at position 27 Wavelength is the distance from the crest to the trough of the same wave.TrueFalse

BlackTom AI · Accepted Answer

The question asks about the definition of wavelength and presents two truth options.
Option 1: True. This would claim that wavelength is the distance from crest to trough. In wave terminology, this is not correct because crest-to-trough distance is half of a full wave cycle, i.e., it corresponds to lambda/2 in a sinusoidal wave, not the full wavelength. Therefore, labeling this as true would be a misunderstanding of the standard definition.
Option 2: False. This matches the conventional definition: wavelength is the distance between corresponding points on successive cycles, commonly crest to crest or trough to trough. It represents one complete cycle of the wave, not the half-cycle distance between crest and trough.
Option 1’s idea confuses half a cycle with a full cycle, which leads to incorrect reasoning about wave spacing.
Option 2 correctly distinguishes between the half-cycle distance (crest to trough) and the full-cycle distance (crest to crest or trough to trough).
In summary, the statement in Option 1 is incorrect because it describes a half-wavelength distance, whereas the standard definition of wavelength refers to a full cycle, such as crest-to-crest.

Question at position 27 Wavelength is the distance from the crest to the trough of the same wave.TrueFalse单项选择题

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