Physics for IGCSE & O level - Waves And Sounds (Section 8 - No. 3)
What is wavelength?
The number of vibrations per second.
The distance between two crests or troughs.
The maximum distance a wave moves from its rest position.
The speed of a wave.
Объяснение
Wavelength is the distance between one point on a wave and the same point on the next wave (e.g., crest to crest).