| 释义 |
Bragg|bræg|
The name of Sir William Henry Bragg (1862–1942) and of his son Sir William Lawrence Bragg (born 1890), English physicists, used attrib. or in the possessive to designate certain laws, effects, etc., in Physics (see quots.).
1913Phil. Mag. XXV. 618 The air equivalent of the carbon was calculated from Bragg's law to be about 78 per cent. of the whole stopping power. 1920Rutherford in Proc. R. Soc. A. XCVII. 387 It can readily be calculated from Bragg's rule. 1923Phil. Mag. XLV. 121 The fact that Bragg's law cannot be strictly true seems to have been pointed out first by Darwin. 1930Rutherford in Proc. R. Soc. CXXIX. 214 When this average size was plotted against the distance from source to chamber, the familiar Bragg ionisation curve was obtained. 1931Physical Rev. XXXVIII. 1420 In this investigation, regular Bragg reflections from the face of crystals oscillating and non-oscillating have been observed in order to notice any variation in intensity or line width. 1934C. Meyer Diffraction of Light viii. 294 Bragg's law, taken literally, states that a given wave-length will be reflected in a given spectral order only when the glancing angle takes a unique value θ. 1940Chambers's Techn. Dict. 108/2 Bragg method, a method of investigating crystal structure by means of X-rays. 1950F. Gaynor Concise Encycl. Atomic Energy 32 Bragg angle, the glancing angle for x-rays reflected by planes of a crystal. 1957Gloss. Terms Nucl. Sci. (A.S.A.) (1958) 21/2 Bragg curve, a curve showing the average number of ions per unit distance along a beam of initially monoenergetic ionizing particles. |