Frequency is measured in which unit?

Frequency is measured in Hertz (Hz), which defines how many cycles of a periodic phenomenon occur in one second. In the context of waves, including sound and electromagnetic waves, Hertz represents the number of complete wave cycles that pass a given point in one second, making it a fundamental unit in understanding waves and oscillations. For instance, if a sound wave has a frequency of 440 Hz, it means that the wave vibrates 440 times each second, which is significant in audio applications, including music.

The other units listed have distinct applications: Decibels (dB) measure sound intensity or power level, Newton (N) is the unit of force in the metric system, and Pascals (Pa) measure pressure. Each of these units serves a critical role in various fields of engineering and physics but does not apply to the measurement of frequency. Therefore, Hertz is the appropriate unit specifically for frequency measurements.