This juxtaposition shows that electromagnetic and acoustic oscillations are of entirely different nature and can’t be matched just as they are. Audible frequencies of oscillating air correspond to long radio range of EM spectrum. If compared by the wavelengths our notes are situated somewhere around the FM radio range. In turn the visible light oscillations are so fast, that they can be matched only with hypersonic waves in some rigid bodies.

These oscillations are so short that they are comparable with the size of atoms in a crystal grid. The faster atoms move – the more heat they carry. A heated body starts to emit electromagnetic waves, starting from infrared and coming to the visible light range after about 1000K. So we can say, that sound and light are two main forms of oscillating energy propagation mechanics. And the similarities between them can be better justified not by their physical nature, but by the nature of human perception of them.

Circle of colorful notes

A is the lowest frequency note and red is the lowest frequency color. It’s the starting point. Then we divide the light spectrum into 12 parts and get scientifically correspondent colors for every note in an octave. Now we can see the circle of musical intervals with our eyes and use it to remember all the musical semitones.

Sound and tone perception
Harmonic series