UV Radiation

UV RadiationUltraviolet rays are the invisible electromagnetic radiation placed in spectrum area between visible spectrum and roentgen radiation. Wave-length of the radiation lies in the range of 100-400 nano meters.Ultraviolet spectrum is divided into three sub-bands:UV-A - long wave-band (315 - 400 nano meters) UV-B-medium (middle) wave band (280 - 315 nano meters) UV -C short-wave band (100 - 280 nano meters)Ultraviolet radiation has the following properties:High chemical activity, invisibility, high penetration capabilities, bactericidal action, has positive effects on human organism in case of short doses (when we get tanned), but in case of large doses leads to negative biological impact: changes on cellular level, changes in metabolism and negative effect on eyes.In the present days world Ultraviolet radiation is used in the following branches:In medicine, cosmetology, agriculture, food industry, printing industry, forensic science, and show business.Ultraviolet radiation is generated by:Solids having temperatures higher than 1000 centigrade degrees, as well as luminescent mercury vapor Stars, including SunLaser equipmentgas-discharge tubes made of quartz, mercury-vapor lampsmercury-vapor rectifiers

Category:

Science & Technology

Tags:

• light
• light source
• lighting