Diskussion:UVA

UVA range

The range of UVA wavelengths is from 315 nm to 400 nm. The following is the official definition given in the ILV:

ultraviolet radiation (UV) (see ILV 845-01-05)

Optical radiation for which the wavelengths are shorter than those for visible radiation.

Note: For ultraviolet (UV) radiation, the range between 100 nm and 400 nm is commonly subdivided into: UV-A, from 315 nm to 400 nm; UV-B, from 280 nm to 315 nm; and UV-C, from 100 nm to 280 nm.

These designations for the UV should not be taken as precise limits, particularly for photobiological effects. In some fields of photobiology the wavelength bands are taken from 200 nm to 290 nm, from 290 nm to 320 nm, and from 320 nm to 400 nm. Sometimes these are (incorrectly) called by the names UV-A, UV-B and UV-C, respectively. Ultraviolet radiation at wavelengths less than 180 nm is considered vacuum ultraviolet radiation. Note that radiation between 380 nm and 400 nm is considered visible radiation although it is also within the formal definition of the ultraviolet band. (nicht signierter Beitrag von 62.245.247.102 (Diskussion) 09:56, 11. Mär. 2013 (CET))