It is essential to know about the scale length of the guitar first before any other part because this plays a huge role in the distance between the frets, failure to calculate the correct distance between the frets will affect how the guitar produces sound. Scale lengths may vary due to the type or brand of guitar.
The spacing of the frets gets nearer to each other when approaching the bridge. The spacing of the fret is due to the fact that each successive note is r=1.0595 higher in pitch and can be calculated using the formula v=f=constant on a given string
(Head)
Explain how amplification is achieved:
Explain the frequency/type of waves: When we pluck the strings of a guitar, the vibration of the string causes the molecules around it to vibrate also and bump into each other and create a series of compressions and rarefactions which is known a longitudinal sound wave. The sound wave travels away from the guitar and we hear it. The frequency that is produced due to the vibration of the guitar string is equivalent to the frequency in which the surrounding air molecules vibrate.
When we pluck a string its frequency can be calculated by using the formula: L represents the length of the string from bridge to nut, which is .5 as shown in the figure