definition of uv-radiation
ultraviolet radiation (uv) is like
visible light or radiowaves electromagnetic radiation.
uv radiation cannot be noticed by the human eye however. uv enclosure by definition the spectral region 400-100 nm and closes thereby the blue part of the visible light on (780-400 nm).
the largest natural source for uv radiation is the sun. the uv-part in the sunlight played an important role with the emergence of the life on earth.
UV-RADIATION is a part the electromagnetic spectrum
handling with UV-RADIATION
UV-RADIATION is higher-energy than visible light. therefore damages at skin and eyes can occur with wrong handling uv devices or the use of inappropriately laid out devices. uv-a radiation (400 - 315 nm) actual like scientific investigations showed - harmless.
uv-b and uv-c jets (315 - 200 nm) can lead to acute and long-term striking or eye damage. nevertheless this radiation range in some applications is needed. opaque covers at uv plants or carrying uv eye protectors and skin coverages protect against damage by uv-b and uv-c radiation.
the effect the UV-RADIATION
radiation releases photochemical reactions in exposed articles. depending upon energy of the UV-RADIATION different effects can enter. therefore a partitioning is necessary into individual wavelength coverages:
• UVA radiation (400 - 315 nm)
• UVB radiation (315 - 280 nm)
• UVC radiation (280 - 200 nm)
• VUV radiation (200 - 100 nm)
VUX radiation (100 - 1 nm)
the most important range for the industrial employment is the UVA radiation (400 - 315 nm). with the UVA radiation plastics and adhesives are hardened and accomplished fluorescent penetrant inspections. the UVB radiation is the portion highest-energy in the sunlight and plays with the accelerated aging of plastics an important role. the UVC radiation (280 to 200 nm) has sufficient energy, in order to kill microorganisms. therefore it is used for the sterilization by air, water and packing material. UV colors and - curl can be likewise dried by course-wavy UVC radiation.
