The length of time in one cycle of a wave determines its what?

• A. Amplitude
• B. Frequency
• C. Wavelength
• D. Velocity

Answer: (B)

The length of time in one cycle of a wave determines its frequency. Frequency is defined as the number of cycles that occur in a unit of time, typically measured in hertz (Hz), which represents cycles per second. When the time for one complete cycle increases, the frequency decreases, and vice versa. This relationship highlights how the duration of each wave cycle directly affects how often those cycles occur over a given period.

Amplitude refers to the height of the wave and is related to the energy it carries but does not involve the time it takes to complete a cycle. Wavelength is the distance between two consecutive points on a wave that are in phase, such as from crest to crest, and is also independent of the duration of one cycle. Velocity pertains to the speed at which the wave propagates through a medium and is determined by both frequency and wavelength, but it is not directly defined by the cycle duration itself. Thus, the link between time per cycle and frequency is fundamental in understanding wave behavior.