In wave language, what name is given to the distance between two successive wave crests?
AThe wavelength of the wave
BThe frequency of the wave
CThe amplitude of the wave
DThe period of the wave
Answer & Solution
Correct answer: A. The wavelength of the wave
1. The distance between two wave crests, or equally between two wave troughs, is a distance measurement.
2. That distance is named the wavelength, expressed in metric units such as metres or nanometres.
3. Frequency counts crests passing a point per second, so it is a rate rather than a distance.
4. Amplitude measures the height of a crest above the null point, which is also not this distance.
_Source: OpenStax Physics (CC BY 4.0), Ch 15 "Light", section 15.1 The Electromagnetic Spectrum_
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