diffraction grating | has definition Polished metallic surface (usually a metallic mirror on a block of glass or quartz) on which has been ruled a great number (in thousands) of parallel lines, used to split light to produce a spectrum. | ![has source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:27:39.0 has source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:27:39.0](facet.gif) |
has definition A system of parallel slits, where the slit width is of the same order as the wavelength of the incident radiation, which is capable of dispersing light into its spectrum. | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:27:39.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:27:39.0](facet.gif) |
has definition An optical device containing thousands of very fine parallel grooves which produce interference patterns in a way which separates out all the components of the light into a spectrum. | ![has source: McLean, I.S. 1997 Electronic Imaging in Astronomy, Wiley, 2001-09-27 09:27:39.0 has source: McLean, I.S. 1997 Electronic Imaging in Astronomy, Wiley, 2001-09-27 09:27:39.0](facet.gif) |
is a kind of spectrograph dispersing element | ![2001-09-27 09:27:39.0 2001-09-27 09:27:39.0](facet.gif) |
spectrograph dispersing element | has dispersion | ![2001-09-27 09:27:38.0 2001-09-27 09:27:38.0](facet.gif) |
has wavefront modification wavelength | ![2001-09-27 09:27:38.0 2001-09-27 09:27:38.0](facet.gif) |
instrument | has operator | ![2001-09-27 09:27:28.0 2001-09-27 09:27:28.0](facet.gif) |
artifact | has creator | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has creation date | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has purpose | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has owner | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
physical object | has location or center of gravity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has angular momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has mass | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has velocity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has temperature | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has volume | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has extent | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has material | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |