https://en.m.wikipedia.org/wiki/File:Abbe-prism.svg
…”
The prism consists of a block of glass forming a right prism with 30°–60°–90° triangular faces. When in use, a beam of light enters face AB, is refracted and undergoes total internal reflection from face BC, and is refracted again on exiting face AC. The prism is designed such that one particular wavelength of the light exits the prism at a deviation angle (relative to the light’s original path) of exactly 60°. This is the minimum possible deviation of the prism, all other wavelengths being deviated by greater angles. By rotating the prism (in the plane of the diagram) around any point O on the face AB, the wavelength which is deviated by 60° can be selected.”…
NOW SOME MAGIC – LET ME KNOW WHEN THIS RINGS A BELL !
1, 4, 7 3, 6, 9 2, 5, 8
https://en.m.wikipedia.org/wiki/Bagua
HUGE HINT FOR THE CLUELESS
MAGIC SQUARE OF 15
Live~NRGY 
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