英语词汇“effective mass”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

effective mass n. the mass of something as calculated or inferred from its effect in a particular context; (Physics) the mass that needs to be assigned to a particle if the usual equations of motion are to hold in a situation where they do not strictly apply; spec. the mass that an electron appears to have in a crystal lattice, where its motion is affected by electric and magnetic fields.

ΚΠ

1842 Philos. Trans. (Royal Soc.) 132 249 The difference of the two last determinations..gives the effective mass [of air] between the stations.

1896 J. Larmor in Philos. Trans. 1895 (Royal Soc.) A. 186 718 The motional forcive..will go on increasing the acceleration of the electron, of effective mass Le², until [etc.].

1909 W. C. D. Whetham in A. C. Seward Darwin & Mod. Sci. xxix. 568 An electric charge possesses mass, and there is evidence to show that the effective mass of a corpuscle increases as its velocity approaches that of light in the way it would do if all its mass were electromagnetic.

1917 Physical Rev. 9 167 For all three metals..the effective mass of the carrier comes out somewhat larger than the accepted value for the mass of a slow moving electron in free space.

1922 T. M. Lowry Inorg. Chem. xxxi. 544 The effective mass of the proton may be greater..when free or associated only with a planetary electron than it is when associated closely with electrons in the nucleus of an atom.

1949 Physical Rev. 75 865/2 The ionization energy of donors is less than that of acceptors, probably because conduction electrons have a smaller effective mass than holes.

1995 P. Woodward My Own Right Time ii. 10 The effective mass of the bob increases slightly when the density of the air increases,..and its inertia has to be added to that of the pendulum.

单词	effective mass
释义	> as lemmas effective mass effective mass n. the mass of something as calculated or inferred from its effect in a particular context; (Physics) the mass that needs to be assigned to a particle if the usual equations of motion are to hold in a situation where they do not strictly apply; spec. the mass that an electron appears to have in a crystal lattice, where its motion is affected by electric and magnetic fields. ΚΠ 1842 Philos. Trans. (Royal Soc.) 132 249 The difference of the two last determinations..gives the effective mass [of air] between the stations. 1896 J. Larmor in Philos. Trans. 1895 (Royal Soc.) A. 186 718 The motional forcive..will go on increasing the acceleration of the electron, of effective mass Le², until [etc.]. 1909 W. C. D. Whetham in A. C. Seward Darwin & Mod. Sci. xxix. 568 An electric charge possesses mass, and there is evidence to show that the effective mass of a corpuscle increases as its velocity approaches that of light in the way it would do if all its mass were electromagnetic. 1917 Physical Rev. 9 167 For all three metals..the effective mass of the carrier comes out somewhat larger than the accepted value for the mass of a slow moving electron in free space. 1922 T. M. Lowry Inorg. Chem. xxxi. 544 The effective mass of the proton may be greater..when free or associated only with a planetary electron than it is when associated closely with electrons in the nucleus of an atom. 1949 Physical Rev. 75 865/2 The ionization energy of donors is less than that of acceptors, probably because conduction electrons have a smaller effective mass than holes. 1995 P. Woodward My Own Right Time ii. 10 The effective mass of the bob increases slightly when the density of the air increases,..and its inertia has to be added to that of the pendulum. extracted from effectiveadj.n. < as lemmas
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