```html Electromagnetic vs. Harmonic Pitch Comparator

Electromagnetic vs. Pitch Double

Frequency doubling maps 1:1 across visible light (400–800 THz) and a musical octave (1×–2×).

Light Frequency
400 THz
λ ≈ 750 nm (Red)
Musical Pitch Note 1
1.00× (C4)
Unison (Fundamental)
Visible Light Spectrum (400 THz → 800 THz)
Musical Staff Octave (C4 → C5)
1.00×
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