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16 December 2025
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N 13:19 | European Standard 2 changes history +662 [Vigen (2×)] | |||
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13:19 (cur | prev) +7 Vigen talk contribs Tag: Visual edit | ||||
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13:18 (cur | prev) +655 Vigen talk contribs (Created page with "European Standards,sometimes called Euronorm (abbreviated EN, from the German name Europäische Norm, "European Norm"), are technical standards which have been ratified by one of the three European Standards Organizations (ESO): European Committee for Standardization (CEN), European Committee for Electrotechnical Standardization (CENELEC), or European Telecommunications Standards Institute (ETSI). All ENs are designed and created by all standards organizations and intere...") Tag: Visual edit | |||
| 10:57 | FEL diffhist +427 Vigen talk contribs | ||||
| N 07:29 | Infrared diffhist +566 Vigen talk contribs (Created page with "'''Infrared''' (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those of red light (the longest waves in the visible spectrum), so IR is invisible to the human eye. IR is generally (according to ISO, CIE) understood to include wavelengths from around 780 nm (380 THz) to 1 mm (300 GHz). For more...") | ||||