| 单词 | powder photography |
| 释义 | > as lemmaspowder photography powder photography n. ΘΚΠ society > communication > representation > a plastic or graphic representation > graphic representation > [noun] > by means of a computer > study or process of X-ray, etc. thermography1840 phosphorography1886 radiography1896 scotography1896 shadow-photography1896 radiophotography1897 roentgenography1899 typoradiography1899 radiology1900 microradiography1913 Laue1915 powder photography1924 stereofluoroscopy1928 cineradiography1934 cinefluorography1936 autoradiography1941 radioautography1941 xeroradiography1950 skiagraphy1957 stereoradiography1965 the world > matter > physics > atomic nucleus > radioactivity > X-rays > study of crystals by X-rays > [noun] > photography used in powder photography1924 1924 R. W. G. Wyckoff Struct. Crystals vi. 185 A more extended description of these procedures is not justified because thus far they have found little application to powder photography. 1948 K. Lonsdale Crystals & X-rays iii. 76 For powder photography monochromatic radiation is used..but the specimen is a mass of tiny crystals orientated in all directions. 1988 L. Pauling in Science 26 Feb. 963/2 In the case of powder photography, there are for each plane some minute crystals with the proper orientation to permit diffraction. < as lemmas |
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