Light & Optics Labλ = c / f • E = hf

725 nm to RGB & Color Calculator

Convert 725 nm monochromatic spectral light into exact digital sRGB, CIE 1931 tristimulus XYZ coordinates, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
725 nm
Deep Red
#98D600
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
413.507 THz
Photon Energy
1.71 eV
sRGB Channels
152, 214, 0
CIE 1931 XYZ
0.0003, 0.0005
Advertisement

Why You See This Color (725 nm)

At 725 nm, photons interact exclusively with Long-wavelength sensitive (L) photoreceptor opsins in the fovea centralis. With a frequency of 413.507 THz and lower photon energy (1.71 eV), this stimulus yields the deep, saturated red sensation of monochromatic ruby and diode lasers. Near the 700–750 nm boundary, eye sensitivity tapers toward the infrared threshold.

Physical Parameter Breakdown

Wavelength (λ):725 nm (725 × 10⁻⁹ m)
Oscillation Frequency (f):413.507 THz
Photon Quantum Energy (E):1.71 eV
CIE 1931 Tristimulus (XYZ):X:0.0003 Y:0.0005 Z:0
lightcontrast-checker Lab Verified

Datacolor SpyderX Pro

Calibrare monitor rapida cu lens-based color engine

Calibrare 2 min
Lens-based precis
Fara senzor ambiental
$169
4.7(3,421)
View on Amazon
Paid link • Amazon
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

Related Physics Calculators