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13 ore fa · Agrippina. Gaius Caesar Augustus Germanicus (31 August 12 – 24 January 41), better known by his nickname Caligula ( / kəˈlɪɡjʊlə / ), was Roman emperor from AD 37 until his assassination in AD 41. He was the son of the Roman general Germanicus and Augustus ' granddaughter Agrippina the Elder, members of the first ruling family of the ...
13 ore fa · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...
