Richardson equationn.

Brit.

/ˈrɪtʃəds(ə)n ᵻˌkweɪʒn/, U.S.

/ˈrɪtʃərds(ə)n əˌkweɪʒ(ə)n/,

/ˈrɪtʃərds(ə)n iˌkweɪʒ(ə)n/

Forms:

α. 1900s– Richardson's equation.

β. 1900s– Richardson equation.

Origin: From a proper name, combined with an English element. Etymons: proper name Richardson , equation n.

Etymology: < the name of Sir Owen W. Richardson (1879–1959), English physicist + equation n. (see note at definition).

Physics.

An equation for the maximum current density of electrons emitted from a hot metal surface in terms of the temperature and work function of the surface.Originally formulated by Richardson 1903 ( Philos. Trans. (Royal Soc.) A. 201 497–549) in the form I = A₁T^½exp(−b/T), where A is a constant, and b is the work function divided by Rydberg's constant R. He later amended it ( O. W. Richardson Emission Electr. from Hot Bodies (1916) ii. 34) to I = A₂T²exp(−ϕ₀/kT). The original formulation was amended by Saul Dushman (quot. 1923), in consequence of which the equation is also called the Richardson–Dushman equation n.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electronics > [noun] > graphs, functions, equations, etc.

static characteristic1900

Richardson equation1913

time constant1943

step function1946

1911 Nature 21 Dec. 258/1 The ionisation current from a metal filament when heated above 2400° absolute ceases to be represented by Prof. Richardson's equation.]

1913 Physical Rev. 2 454 This indicates that these results can be expressed by Richardson's equation.

1923 S. Dushman in Physical Rev. 21 623 The equation assumes the simple form I = AT²ε^−b₀/T... Its chief advantage over the usual Richardson equation, I = A₁T^½ε^−b/T,..is that A is theoretically a universal constant.

1939 H. J. Reich Theory & Applic. Electron Tubes ii. 17 Richardson's equation holds only for the saturation current.

1975 D. G. Fink Electronics Engineers' Handbk. xxvii. 12 If V_C < ϕ_e,..the saturation current density j_s is as given by Richardson's equation.

2000 U. L. Rohde & D. P. Newkirk RF/Microwave Circuit Design for Wireless Applic. ii. 129 The current–voltage relationship for a barrier diode is described by the Richardson equation.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	richardson equation
释义	Richardson equationn. Brit. /ˈrɪtʃəds(ə)n ᵻˌkweɪʒn/, U.S. /ˈrɪtʃərds(ə)n əˌkweɪʒ(ə)n/, /ˈrɪtʃərds(ə)n iˌkweɪʒ(ə)n/ Forms: α. 1900s– Richardson's equation. β. 1900s– Richardson equation. Origin: From a proper name, combined with an English element. Etymons: proper name Richardson , equation n. Etymology: < the name of Sir Owen W. Richardson (1879–1959), English physicist + equation n. (see note at definition). Physics. An equation for the maximum current density of electrons emitted from a hot metal surface in terms of the temperature and work function of the surface.Originally formulated by Richardson 1903 ( Philos. Trans. (Royal Soc.) A. 201 497–549) in the form I = A₁T^½exp(−b/T), where A is a constant, and b is the work function divided by Rydberg's constant R. He later amended it ( O. W. Richardson Emission Electr. from Hot Bodies (1916) ii. 34) to I = A₂T²exp(−ϕ₀/kT). The original formulation was amended by Saul Dushman (quot. 1923), in consequence of which the equation is also called the Richardson–Dushman equation n. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > [noun] > graphs, functions, equations, etc. static characteristic1900 Richardson equation1913 time constant1943 step function1946 1911 Nature 21 Dec. 258/1 The ionisation current from a metal filament when heated above 2400° absolute ceases to be represented by Prof. Richardson's equation.] 1913 Physical Rev. 2 454 This indicates that these results can be expressed by Richardson's equation. 1923 S. Dushman in Physical Rev. 21 623 The equation assumes the simple form I = AT²ε^−b₀/T... Its chief advantage over the usual Richardson equation, I = A₁T^½ε^−b/T,..is that A is theoretically a universal constant. 1939 H. J. Reich Theory & Applic. Electron Tubes ii. 17 Richardson's equation holds only for the saturation current. 1975 D. G. Fink Electronics Engineers' Handbk. xxvii. 12 If V_C < ϕ_e,..the saturation current density j_s is as given by Richardson's equation. 2000 U. L. Rohde & D. P. Newkirk RF/Microwave Circuit Design for Wireless Applic. ii. 129 The current–voltage relationship for a barrier diode is described by the Richardson equation. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1913
随便看	pornographically pornographico-devotional pornographicodevotional pornographies pornographist pornographize pornographized pornography pornomania pornomaniac pornophile pornophobe pornophobic pornophotographer pornos pornosec pornosophical pornotopia porns porny poro poro- porocyte porodinic porodinous