frekvenciája

Frekvencia, in physics and related fields, is the number of occurrences of a repeating event per unit time. It is a fundamental descriptor of periodic phenomena such as vibrations, waves, and oscillations. In the International System of Units (SI), frequency is measured in hertz (Hz), where 1 Hz equals one cycle per second. The angular frequency, measured in radians per second, is related to frequency by the relation ω = 2πf.

The inverse of frequency is the period, the duration of one complete cycle. Thus f = 1/T and T = 1/f. Frequencies can be mechanical, acoustic, electromagnetic, or electronic, and they determine the pitch of sounds, color of light, and the behavior of signal systems. The frequency content of a signal is often analyzed using Fourier methods, which decompose a complex waveform into its constituent frequencies.

In digital and communication systems, sampling frequency f_s defines how often samples are taken per second. The Nyquist theorem states that to avoid aliasing, the maximum frequency that can be unambiguously represented is f_s/2.

In Hungarian, the word frekvencia means frequency, and frekvenciája is the possessive form meaning “its frequency” or “the frequency of.” It is used to refer to the frequency of a specific phenomenon and is inflected according to grammar and case.

Examples: a pendulum with a 2-second period has a frequency of 0.5 Hz; visible light with a wavelength around 550 nm has a frequency near 5.45×10^14 Hz. Measurements of frequency employ devices such as frequency counters, oscilloscopes, spectrometers, and spectrum analyzers.