| Imagine this 150k webpage as the user's manual for a piano that plays lights instead of sounds twelvefold-extended to 1090 keys (from the piano's 88) spanning not seven but 109 octaves each with not 12 but 10 notes, equally-spaced; each octave (as on the piano) halving the frequencies of the octave above (and consequently doubling the corresponding wavelengths) but mirror-reversed so the high notes are on the left, low on the right keys numbered from 0.0 (highest) to 108.9 (lowest) with the first, leftmost, highest octave generating ten hues from the spectrum of visible light: violet blue green yellow orange red. The Octaves of Light |