EM Spectrum
Red Light (620 nm)
484.0 THz
Cosmic Octave Color
Red (619 nm)
Display swatch #e9852d
Octave-shifted: 14.1 kHz (-35 octaves)
EstablishedPhysical Measurement
Evidence Level
Established
Source Count
1
Last Reviewed
March 23, 2026
Directly measured, standardized, or well-supported in mainstream scientific or technical literature.
This entry documents a measurable or standardized frequency reference. The atlas is a research and practice guide, not a medical diagnostic instrument.
Review the evidence modelRed visible light at ~620 nm wavelength. Lowest frequency of visible light. Red light therapy is used for skin healing and inflammation.
Claim Type
Physical Measurement
Traditional Color
Red
Cosmic Octave Color
Red (619 nm) · #e9852d
Source
Optics
Sources
Optics and Physics References
4 atlas references
Used for visible-light wavelengths, electromagnetic ranges, and general physics conversions.
Optics, physics, and electromagnetic-spectrum references.
visible-lightem-spectrumcolorred