Red Light (620 nm)
484 THz
Red visible light at about 620 nm.
How well is this supported?
Measured directly, or defined by a published standard.
This value is measured, or set by a published standard.
About this number
Red visible light at about 620 nm. Red is the lowest-frequency color band in visible light. It extends to somewhere between 760 and 830 nm, so 620 nm is not the lowest visible frequency.
What is said about it
What is said, not what was measured
Red and near-infrared light is used in photobiomodulation, often called red light therapy. Proponents use it for skin healing and inflammation. Evidence varies by condition.
Facts
- Frequency
- 484 THz
- Wavelength (electromagnetic wave)
- 619 nm
- Kind of light
- Red (619 nm)
- Kind of statement
- Physical measurement
- Filed under
- Radio & light
Sources
- Definitions of visible light and ultraviolet
Where visible light and ultraviolet begin and end. The authorities do not agree exactly on the limits.
CIE International Lighting Vocabulary, terms 17-21-003 (visible radiation) and 17-21-008 (ultraviolet radiation). ISO 21348. BIPM, definition of the candela at 540 THz (555 nm).
View source: Definitions of visible light and ultraviolet