# SI Unit of Frequency is __________

By BYJU'S Exam Prep

Updated on: September 25th, 2023

1. Diopter
2. Watt
3. Hertz
4. Decibel

SI unit of frequency is hertz. The frequency of a sound wave is the rate of vibrations per second that it experiences.

### SI Unit of Frequency

• F or v are used to indicate it.
• Hertz is the SI unit for frequency (Hz).
• The accepted unit for calculating a wave’s frequency is Hertz.
• The cycles per second is equivalent to one Hertz.
• The frequency of a repeated event is its number of instances per unit time.
• It is known as temporal frequency, emphasising the distinction between angular frequency and spatial frequency.
• The unit of frequency measurement is hertz, or one repetition of a repeating event per second.
• f = 1/T, is the formula for frequency where f = frequency and T = period.
• If the frequency is in periodic motion, it undergoes one cycle after passing through a series of positions or events and returns to its original state.
• The frequency is equal to the reciprocal of the time period of the wave.

Other units of physical Quantity

Force – Newton

Length – meter

Frequency – Hertz

Velocity – m/sec

Time – sec

Mass – kilogram

Lens – diopter

Sound – decibel