Light & Optics Labλ = c / f • E = hf

520 nm to RGB & Color Calculator

Approximate how 520 nm monochromatic spectral light can be represented in sRGB, and calculate CIE 1931 tristimulus values, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
520 nm
Green
#00FFA9
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
576.524 THz
Photon Energy
2.384 eV
sRGB Channels
0, 255, 169
CIE 1931 XYZ
0.0671, 0.7065

Why You See This Color (520 nm)

At 520 nm, the radiation strikes the human retina close to the peak photopic sensitivity curve V(λ) (555 nm). Both M-cones (chlorolabe) and L-cones (erythrolabe) are strongly depolarized, maximizing luminous efficacy per watt of optical power. The visual system perceives this radiant energy (576.524 THz, 2.384 eV) as brilliant emerald green to chartreuse, mapped here to digital sRGB gamut coordinates.

Physical Parameter Breakdown

Wavelength (λ):520 nm (520 × 10⁻⁹ m)
Oscillation Frequency (f):576.524 THz
Photon Quantum Energy (E):2.384 eV
CIE 1931 Tristimulus (XYZ):X:0.0671 Y:0.7065 Z:0.0854
Traian Anghel
Traian AnghelAuthor & Reviewer

Physics Teacher & Educational TechnologistBrăila, Romania

Last Reviewed: August 2026
Wave Lab calculators are constructed using rigorous peer-reviewed physics formulas from verified metrological repositories. Every equation, spectral conversion, and acoustic property is tested against NIST, CIE, and ISO datasets.
Verified Sources:NIST CODATACIE 1931 2° ObserverNASA Glenn Research

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