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One of the strings on a guitar is 29cm long. What is the wavelength of the...

One of the strings on a guitar is 29cm long. What is the wavelength of the fundamental frequency for this string? Answer: 58cm

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A guitar string has a number of frequencies at which it will naturally vibrate. These natural frequencies are known as the harmonics of the guitar string. The natural frequency at which an object vibrates at depends upon the tension of the string, the linear density of the string and the length of the string. Each of these natural frequencies or harmonics is associated with a standing wave pattern.

Now the problem solving scheme goes as follows:

The wavelength of the standing wave for any given harmonic is related to the length of the string (and vice versa). If the length of a guitar string is known, the wavelength associated with each of the harmonic frequencies can be found.

In this problem (and any problem), knowledge of the length and the harmonic number allows one to determine the wavelength of the wave. For the first harmonic, the wavelength is twice the length.

Given: length of the string on a guitar = 29cm.

Solution : wavelength = 2 * length of the string on the guitar = 2 * 29 cm = 58cm.

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