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frequency
Also known as temporal frequency, ordinary frequency
Frequency is the number of occurrences of a repeating event per unit of time. Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.
AI overview
Frequency measures how often something repeats in a given amount of time—for example, how many times a wave goes up and down in one second. Scientists and engineers use frequency to describe and understand repeating phenomena like vibrations, sound, radio waves, and light, making it essential for technologies like radios, speakers, and telecommunications.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Physical quantity.name
- Frequency
- Physical quantity.image
- ลูกตุ้มธรรมชาติ.gif
- Physical quantity.caption
- A pendulum making 25 complete oscillations in 60 s, a frequency of 0.41 Hz
- Physical quantity.unit
- hertz (Hz)
- Physical quantity.baseunits
- s−1
- Physical quantity.dimension
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- Commons category
- Frequency
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- purl.org/dc/terms/Frequency
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Article
20 sectionsContents
- Definitions and units {{anchor|Definitions|Units|Definition|Unit}}
- Period versus frequency
- Related quantities
- In wave propagation {{anchor|Frequency of waves}}
- Measurement
- Counting
- Stroboscope
- Frequency counter
- Heterodyne methods
- Examples
- Light
- Sound
- Line current
- Aperiodic frequency
- See also
- Notes
- References
- Sources
- Further reading
- External links
Frequency is the number of occurrences of a repeating event per unit of time. Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.
The interval of time between events is called the period. It is the reciprocal of the frequency. For example, if a heart beats at a frequency of 120 times per minute (2 hertz), its period is one half of a second.