| 释义 |
massless, a.|ˈmæslɪs|
[f. mass n.2 + -less.]
Having no mass. Also ˈmasslessness.
1879Thomson & Tait Nat. Phil. I. i. §345 A material particle supported by massless springs. 1947Mind LVI. 50 Consider a weight of mass m hanging downwards under gravity on a (massless) elastic strand. 1963K. W. Ford World of Elementary Particles 115 One necessary condition for masslessness seems to be the absence of charge. Every charged particle has mass, although not every neutral particle is massless. 1971Guinness Bk. Records (ed. 18) v. 70/1 Of all sub-atomic concepts only the neutrino calls for masslessness. 1972Sci. Amer. June 53/1 Massless uncharged particles that interact so little with other particles that the outer layers of the sun and solid bodies such as the earth are virtually transparent to them. |