UV, or ultraviolet, rays are the sun's invisible burning rays. They can cause sunburns, and in some cases skin cancer. There are three types of UV rays: UVB: Are the primary cause of sun burning, premature aging of the skin and the development of skin cancer.UVC: Are blocked by the ozone layer and do not reach the earth's surface.hey can cause sunburns, and in some cases skin cancer. There are three types of UV rays: UVB: Are the primary cause of sun burning, premature aging of the skin and the development of skin cancer. UVC: Are blocked by the ozone layer and do not reach the earth's surface.
About the IAC. The Intersocietal Accreditation Commission (IAC) provides accreditation programs for vascular testing, echocardiography, nuclear/PET, MRI, diagnostic CT, dental CT, carotid stenting, vein treatment and management and cardiac electrophysiology.
The IAC is the official civil aviation authority in Russia while some other countries recognize it as a certification and expert body to a varying extent. The Interstate Aviation Committee was formed in 1991 according to the Civil Aviation and Airspace Use Treaty, signed on December 25, 1991. The Air Accident Investigation Commission of the IAC regularly works with the Federal Air Transport Agency in investigations of aviation accidents and incidents. The committee is headquartered in Yakimanka District, Central Administrative Okrug, Moscow, Russia.