Before entering fully into the clarification of the meaning of the term wavelength, it is interesting that we proceed to determine the etymological origin of the two main words that shape it:
-Amplitude, first, derives from Latin. Specifically, it comes from “amplified”, which can be translated as “quality of extensive”. In the same way, it should be noted that this term is the result of the sum of two components: the adjective "amplus", which is synonymous with "extensive" or "wide", and the suffix "-tud", which is used to Indicate quality.
-Onda, on the other hand, is a word that comes from Latin, exactly "unda", which is equivalent to "ola".
The notion of amplitude it can be used to name the lengthening, the stretching or the widening of something. Is called wave , on the other hand, to the movement of propagation that a fluid makes, to the elevations formed by the disturbance of the surface of a liquid substance and to the way of propagation that the magnetic and electric fields have in space.
The concept of wavelength appears on the ground of the physical and is linked to highest value which records a variable, measured from the midpoint or balance . In an electromagnetic signal or in a wave motion, the wavelength is the distance between the maximum value (the highest point of the wave) and the equilibrium point.
The wavelength can be seen in a graphic with a sinusoid curve in the Cartesian coordinates. If we take the X axis as a midpoint, the wavelength will be given by the space that exists between the highest point in the Axis y that touches the sinusoid and the one mentioned X axis .
A physical disturbance, in this way, can be plotted on a model as a magnitude whose value changes over time. The wavelength is noticed when analyzing the values according to the points occupied by the disturbance (plotted as a wave) in the space .
In the case of sound waves , the wavelength reveals the distance between the peak of the wave (the highest value) and its base, measured in decibels . As the wavelength increases, decibels increase, reflecting a growth in the intensity (he volume ) of the sound .
There is another important series of aspects that must be known about the aforementioned wavelength. Specifically, we can underline that the units to measure it will vary depending on the type of wave we are referring to:
-When it is a mechanical class wave, the use of what are the units of length will be used to measure it.
-In the case that you are working with an electromagnetic wave, what will be done to measure the amplitude will be to use a unit that responds to the name of candles.
-If, on the other hand, we are referring to alternating current waves, we will use amps and volts in their measurement.
-When we are dealing with sound waves, what will be done will be to opt for what are units such as the millibar, the pascal or the set of remaining units.