book illustrations


These images are licensed under:
Creative Commons
Attribution – Share Alike 3.0 Germany (CC BY-SA 3.0 DE)

Graphics: Doro Tops (2016) according to specifications of Hans Cousto


Flower of Life






Movement of the vernal equinox along the ecliptic
The zodiac precessional timeline. The dates designate when the vernal equinox was in approximate conjunction with the indicated ecliptic position.



Piano Frequencies
octaves and frequencies



Scale of natural harmonics on a vibrating string
The simplest case to visualise the scale of natural harmonics is a vibrating string, as in the illustration; the string has fixed points at each end, and each harmonic mode divides it into 1, 2, 3, 4, etc., equal-sized sections resonating at increasingly higher frequencies. The fact that a string is fixed at each end means that the longest allowed wavelength on the string (which gives the fundamental frequency) is twice the length of the string (one round trip, with a half cycle fitting between the nodes at the two ends). Other allowed wavelengths are 1/2, 1/3, 1/4, 1/5, 1/6, etc. times that of the fundamental.



Balmer lines of the hydrogen atom
Balmer's geometric representation of the hydrogen series
Geometric development of spectral series of hydrogen



Hydrogen Spectrum
The figure shows the position of the spectral lines of hydrogen in the visible spectrum, ranging from violet at about 400 nm wavelength (1 nm = 10-9 m) to red at 800 nm.