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Date: 2009-06-08 13:54:59Optical filters Surveillance Optical devices Infrared Filter Diffraction grating Visible spectrum Slide projector Telescope Electromagnetic radiation Infrared imaging Electromagnetic spectrum | Microsoft Word[removed]Sensing invisible-TNAdd to Reading ListSource URL: www.sofia.usra.eduDownload Document from Source WebsiteFile Size: 631,37 KBShare Document on Facebook |