Oscillation and nature

Sonic and light are oscillations.

Sonic

In sonic the air oscillates. It oscillates the pressure within the air. From the source spheric waves moves to the recipient. The eardrum recives the pressur and leads it to the brain. Ther occurs the hering impression.

Light

In light the photones oscillate.Light is the visable part of the electro magnetic spectrum.
electro magnetic spectrum Picture: The electro magnetic spectrum - human visable area [source:WikiPedia]
The frequence area of visable light includes one octave.

Oscillations

Every oscillation has its own frequency. In sonic it determinates the tone-heigth. In light it determs the color.
Every frquency equals to a wavelength. That is to spartial length a single oscillation needs.
f = c / λ
with:
  • f frequency. Number of oscillations per second in Hz.
  • c the velocity of propagation. In sonic round about 360m/s. In light its the speed of light.
  • λ the wavelength
harmonic oscillation Picture: harmonic oscillation [source:WikiMedia]
A ton A with 440Hz has a length of 81.8 cm on the x-axis. The air pressure equals to the y-axis.

Converting tones to color, length and tempo


The frequency of light can be transformed to a audibily area. The frequency of light can be halfed untill it is within the audibily area. Every besection equals to an octave. For each tone a frequency can be found. Analog will tones be transformed into length and tempos. In this Table tone and attributes are shown.

The standard pitch A has a frequency of 440Hz. It relates to a lenght of 81.81cm, a tempo of 103bpm and this color:

Humans are able to hear tones of the frequency from 16 Hz to 20 kHz. Those are 10 octaves.
Humans are able to see light of the wavelengths from 380 nm to 750 nm. That is one octave.

Sonic oscillations

Real sonic oscillations adds up from more different tones. Depending on gemetrie and material of the body of sound different overtones in different intensety occurs. Thats why the same ton sounds different played on a viola as on a transverse flute. Any body has its own resonance frequency.

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