MAKE A MEME
View Large Image
| View Original: | Fluorescent Black-Light spectrum with peaks labelled.gif (800x515) | |||
| Download: | Original | Medium | Small | Thumb |
| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: Fluorescent Black-Light spectrum with peaks labelled.gif Image uploaded in en wikipedia org into the Public Domain by en user Deglr6328 on 7 Oct 2005 Original summary Spectrum of light from a fluorescent black light with peaks labelled The spectrum was taken with an Ocean Optics HR2000 spectrometer http //www oceanoptics com The spectrometer used appears to be about ~ 3 to 8 nm off judging from the location of known peaks Fluorescent black lights are usually made the same way as regular Wikipedia fluorescent lamps except the clear glass used in normal fluorescent lights is replaced with Wood's glass which is a glass that has been doped with nickel oxide making it a deep blue/purple color and blocking virtually all visible light above ~400 nm Also the phosphor used on the inner surface of the tube differs from the typical multi phosphor blend used in normal fluorescent lights to produce visible light and in black lights is either europium doped strontium fluoroborate or europium doped strontium tetraborate to produce a peak near 370nm as in this lamp or a lead doped barium silicate to produce a peak near 351 nanometers The phosphor fluoresces due to irradiation by short-wave ultraviolet light UV-C produced by mercury vapor in the tube A small amount of the violet light produced by the 404 nm mercury spectral line leaks through the glass filter causing the second small peak at 404 nm More info http //www uvsystems com/articles/LW_UV_Sources_for_Mineral_Collectors pdf Spectrum taken by me wikitable Peak number Wavelength of peak nm Species producing peak Actual line location nm - 1 370 europium doped strontium tetraborate ~370 - 2 405 mercury 404 656 Deglr6328 graph Spectral power distribution Fluorescence Black light | ||||
