| 单词 | free path |
| 释义 | > as lemmasfree path free path n. Physics (a) the distance which a molecule or other particle traverses without encountering another particle and without colliding with the walls of the containing vessel; cf. mean free path n. at mean adj.2 Compounds; (b) the distance a sound wave travels between successive reflections from the walls of an enclosure. ΘΚΠ the world > matter > physics > atomic physics > particle physics > [noun] > action of colliding > distance without collision free path1871 the world > matter > physics > science of sound > sound-waves > [noun] > path followed by > without impedance free path1947 1871 J. C. Maxwell Theory of Heat xxii. 287 We shall refer to this mutual action as an Encounter between two molecules, and we shall call the course of a molecule between one encounter and another the Free Path of the molecule. 1878 Proc. Royal Soc. 28 108 The action of the magnet is to twist the trajectory of the molecules round in a direction at an angle to their free path. 1940 J. H. Jeans Introd. Kinetic Theory Gases v. 131 Viscosity and conduction of heat can be explained in terms of the collisions of gas molecules, and of the free paths which the molecules describe between collisions. 1947 Proc. Physical Soc. 59 536 For rooms of the usual shapes the mean free path of sound is independent of the shape. 1997 Infrared Physics & Technol. 38 10/1 The inelastic free path of holes in metal is short. < as lemmas |
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