EVERYDAY SCIENCE

Detailed explanation-1: -The UV component of terrestrial radiation from the midday sun comprises about 95% UVA and 5% UVB; UVC and most of UVB are removed from extraterrestrial radiation by stratospheric ozone. Approximately 5% of solar terrestrial radiation is UVR, and solar radiation is the major source of human exposure to UVR.

Detailed explanation-2: -Extreme UV radiation has the shortest wavelength range and highest energies of the regions of the ultraviolet spectrum, and lies on the border between UV and X-ray radiation. Extreme UV radiation spans the 10 to 30 nm wavelength range.

Detailed explanation-3: -Ultraviolet (UV) is a form of electromagnetic radiation with wavelength shorter than that of visible light, but longer than X-rays.

Detailed explanation-4: -The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).