Radiation is the emission (sending out) of energy from any source. There are many types of radiation. Ultraviolet (UV) radiation is a form of electromagnetic radiation. The main source of UV radiation (rays) is the sun, although it can also come from man-made sources such as tanning beds and welding torches.Radiation exists across a spectrum from very high-energy (high-frequency) radiation â like x-rays and gamma rays â to very low-energy (low-frequency) radiation â like radio waves.he main source of UV radiation (rays) is the sun, although it can also come from man-made sources such as tanning beds and welding torches. Radiation exists across a spectrum from very high-energy (high-frequency) radiation â like x-rays and gamma rays â to very low-energy (low-frequency) radiation â like radio waves.
By Heidi, White is a simple, clean and crisp color with many different varieties: off-white, eggshell, bright white, ivory, cream, ecruâ¦wait, whatâs ecru? Ecru is the term often used by fine stationery printers to describe ivory or cream colored paper.
Ecru comes from the French word Ã©cru, which means literally 'raw' or 'unbleached'. Since at least the 1950s, however, the color ecru has been regarded as a different color from beige, presumably in order to allow interior designers a wider palette of colors to choose from.