How is frequency defined?

Frequency is defined as the number of wavelengths that pass a specific point in one second. This concept is critical in understanding wave behavior and characteristics. It quantifies how often the repetitive cycle of a wave occurs in a given time frame.

In other words, if you imagine a wave traveling along a beach, the frequency tells you how many wave crests hit a certain point on the shoreline every second. Frequency is measured in hertz (Hz), where one hertz corresponds to one cycle per second.

This definition highlights the relationship between frequency and the wave's speed and wavelength. Specifically, wave speed is the product of frequency and wavelength, a relationship that is vital in various applications, from sound waves to electromagnetic waves.

The other options relate to different properties of waves. One describes amplitude, which refers to the maximum height from the rest position to the crest or trough of the wave. Another option describes distance traveled, which pertains to wavelength rather than frequency. The final choice speaks about the period, which is the inverse of frequency, representing the time taken for one complete wave cycle to pass a point. Understanding these distinct definitions is essential for grasping the overall behavior of waves in various contexts.