Wave Frequency

Frequency Range of Radio Waves

Waves have some characteristics features. All waves are made up of crests and troughs. Crests represent the high points while the troughs are the low points of a wave.
Wavelength of a wave is defined as distance between two consecutive crests or between two consecutive troughs.
The frequency or ‘f’ of a wave measures total number of wavelengths that are passing through a particular point in unit time.
Freq. is measured in Hertz. Some other common units for freq. are kilohertz, megahertz, gigahertz etc.
The radio waves have wavelengths longer than the infrared in the wavelength spectrum. The radio waves have freq. between 3 KHz to 300 GHz.

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Wave Frequency Formula

Any wave has three important characteristics:
1. Velocity (v);
2. Frequency (f); and
3. Wavelength (λ).
These characteristics are related to each other by a formula which is known as wave ‘f’ formula and is given by;
v = f * λ;
here; v = velocity of wave, f = ‘f’ of wave and λ = wavelength of wave.

What is the Frequency of Radio Waves

Radio waves are used in communications. The ‘f’ range of radio waves lies above audible region and below the visible light region. The ‘f’ of radio waves starts from a few kilohertz to several terahertz.
The various uses of radio waves are;
1. Communications;
2. Microwave;
3. Television & Radio Broadcasting.

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Radio Waves Frequency Range

As described below the radio waves have larger wavelength then the visible light and as we know that the wavelength is inversely proportional to the ‘f’ so the radio waves have lower ‘f’ then the visible light.

The radio waves are divided into several bands based on the wavelength and frequencies;
1. Very Low ‘f’ (VLF)
‘f’ range : 3 - 30 KHz
Wavelength: 100,000 - 10,000 meters

2. Low ‘f’ (LF)
‘f’ Range: 30 - 300 KHz
Wavelength: 10,000 - 1,000 meters

3. Medium ‘f’ (MF)
‘f’ range: 300 KHz - 3 MHz
Wavelength: 1,000 - 100 meters

4. High ‘f’ (HF)
‘f’ range: 3 - 30 MHz
wavelength: 100 - 10 meters

5. Very High ‘f’ (VHF)
‘f’ range: 30 - 300 MHz
Wavelength: 10 - 1 meter

6. Ultra High ‘f’ (UHF)
‘f’ range: 300 MHz - 3 GHz
Wavelength: 1 meter - 10 cm

Above the UHF is the IR and visible region.

Vibrating String Frequency

Introduction to vibrating string frequency

A vibration within a string is a wave. Generally vibrating strings produce a resonance whose occurrence within the majority cases is unvarying. Consequently, given that frequency characterize the field, the sound formed is an unvarying message. Vibrating strings be the beginning of some string apparatus similar to guitar, cello, otherwise piano. I like to share this formula convert celsius to fahrenheit with you all through my article.

Vibrating String Frequency

Vibration, reputation waves within a string, the fundamental with the initial 6 overtone to create a harmonic sequence.

The momentum of propagation of a signal within a string (v) is relative toward the square root of the tension of the string (T) with inversely proportional toward the square root of the linear accumulation (μ) of the series:

`nu= sqrt(T/mu)`

Frequency of the wave

One time the momentum of spread is recognized, the frequency of the resonance formed through the series is able to be calculated. The momentum of spread of a wave be equivalent toward the wavelength λ separated through the period τ, or else multiply through the frequency f:

`nu=lambda/(tau)= lambdaf`

But the extent of the string be L, the essential harmonic be the individual created through the vibration whose nodes be the two split ends of the series, as a result L be partially of the wavelength of the essential harmonic. Therefore:

`f = (nu)/(2L)=(1)/(L)sqrt((T)/(mu))`

Wherever T be the tension, μ be the linear collection, also L be the length of the vibrate fraction of the string.


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Observe string vibrations

Waveforms lying on a vibrating string but the frequency are small adequate also the vibrating string be detained within abut of a CRT display for example individual of a small screen or else a computer. This consequence is call the stroboscopic result, also the speed on which the sequence seem near shake be the distinction among the frequency of the string with the revive rate of the display.

The similar are able to occur by a glowing street lamp, on a rate which is the dissimilarity among frequency of the sequence along with the frequency of the discontinuous current.