[12.1] For practical purposes, any radiant energy within the wavelength range 10 to 400 nm is considered ultraviolet (UV) radiation.*
(See also regions of the electromagnetic spectrum for nominal subdivisions of the UV spectrum.)
* References:
- Hollander A (ed.). Radiation Biology, Vol. 2: Ultraviolet and Related Radiations. New York: McGraw‑Hill Book Co.; 1955
- Koller LR. Ultraviolet Radiation. New York: John Wiley and Sons, Inc.; 1952
- DiLaura D, Houser K, Mistrick R, Steffy G. M. S. (eds.). The Lighting Handbook, 10th ed.; Chapter 3. New York: Illuminating Engineering Society of North America; 2010