The distance from a fixed point on a wave to the next corresponding point is known as what?

• A. Frequency
• B. Pulse length
• C. Velocity
• D. Wavelength

Answer: (D)

Wavelength is the spatial period of a wave—the distance the wave travels during one complete cycle. If you pick a fixed point on the wave, such as a crest, the next crest occurs one wavelength away. In simple terms, it’s the length of one full cycle along the medium, measured in meters. This distance is related to the wave’s speed and frequency by λ = v / f, so for a given medium, higher frequency means shorter wavelength.

Frequency is how many cycles pass a point each second, not a spatial distance. Velocity is how fast the wave travels through the medium, not the distance between repeating points. Pulse length refers to the length of a single pulse, which is about the duration or extent of an individual burst, not the repeating spacing of a continuous wave.