Post 1 of the Mathematics of Colour series
Topics T1–T3 · ≈16 min
The Oblong on the Wall
A visible photon carries a few electron-volts — inline, E=hν — and in
display form,
E=λhc≈λ1240 eV⋅nm.
W-01 Widget Interactive widget W-01 Interactive version arrives in a later build phase.
EM-spectrum locator: a scale-of-ten zoom that shrinks the visible band to a sliver of the whole electromagnetic spectrum.