# Relationship between frequency and time

### What is the relationship between frequency and period? - The Handy Physics Answer Book 1 state the relationship between frequency and time period of a wave 2 the wavelength of a vibrations produces on the surface of the water is 2cm if t taw9less. Relation between frequency and time period. By the definition of frequency,. ∴ f vibrates are completed in one second. ∴ 1 vibration is completed in 1/f second. Frequency is the number of occurrences of a repeating event per unit of time. It is also referred For other uses, see Frequency (disambiguation). Diagram of the relationship between the different types of frequency and other wave properties.

Frequency counter Modern frequency counter Higher frequencies are usually measured with a frequency counter. This is an electronic instrument which measures the frequency of an applied repetitive electronic signal and displays the result in hertz on a digital display. It uses digital logic to count the number of cycles during a time interval established by a precision quartz time base. Cyclic processes that are not electrical in nature, such as the rotation rate of a shaft, mechanical vibrations, or sound wavescan be converted to a repetitive electronic signal by transducers and the signal applied to a frequency counter.

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This represents the limit of direct counting methods; frequencies above this must be measured by indirect methods. Heterodyne methods[ edit ] Above the range of frequency counters, frequencies of electromagnetic signals are often measured indirectly by means of heterodyning frequency conversion.

A reference signal of a known frequency near the unknown frequency is mixed with the unknown frequency in a nonlinear mixing device such as a diode. This creates a heterodyne or "beat" signal at the difference between the two frequencies.

If the two signals are close together in frequency the heterodyne is low enough to be measured by a frequency counter. This process only measures the difference between the unknown frequency and the reference frequency.

To reach higher frequencies, several stages of heterodyning can be used. This vibration creates a disturbance that moves through the slinky and transports energy from the first coil to the last coil.

A single back-and-forth vibration of the first coil of a slinky introduces a pulse into the slinky. But the act of continually vibrating the first coil with a back-and-forth motion in periodic fashion introduces a wave into the slinky. Suppose that a hand holding the first coil of a slinky is moved back-and-forth two complete cycles in one second. The frequency of a wave refers to how often the particles of the medium vibrate when a wave passes through the medium. Frequency is a part of our common, everyday language.

For example, it is not uncommon to hear a question like "How frequently do you mow the lawn during the summer months? If a coil of slinky makes 2 vibrational cycles in one second, then the frequency is 2 Hz. If a coil of slinky makes 3 vibrational cycles in one second, then the frequency is 3 Hz. The quantity frequency is often confused with the quantity period.

Period refers to the time that it takes to do something. When an event occurs repeatedly, then we say that the event is periodic and refer to the time for the event to repeat itself as the period. The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately days; it takes days for the Earth to complete a cycle.

The period of a typical class at a high school might be 55 minutes; every 55 minutes a class cycle begins 50 minutes for class and 5 minutes for passing time means that a class begins every 55 minutes. The period for the minute hand on a clock is seconds 60 minutes ; it takes the minute hand seconds to complete one cycle around the clock.

Relation between Wavelength and Frequency - By Vineet Khatri

Frequency and period are distinctly different, yet related, quantities. Frequency refers to how often something happens.

## Frequency and Period of a Wave

Period refers to the time it takes something to happen. Frequency is a rate quantity. Period is a time quantity. As an example of the distinction and the relatedness of frequency and period, consider a woodpecker that drums upon a tree at a periodic rate.