| 释义 |
Balmer, n.3 Physics.|ˈbælmə(r)|
The name of Johann Jakob Balmer (1825–98), Swiss physicist, used attrib. and in the possessive with reference to a series of lines discovered by him in 1885 (Ann. d. Physik u. Chemie XXV. 80) in the visible and ultraviolet part of the spectrum of atomic hydrogen, with wave numbers represented by the formula R(1/22 - 1/m2) (where R is the Rydberg constant and m = 3,4,..).
[1887Encycl. Brit. XXII. 379/2 As a first approximation Balmer's expression gives a very good account of the hydrogen spectrum.] 1891Sci. Trans. R. Dublin Soc. 2nd Ser. IV. 567 The discovery of Balmer's law has stimulated other inquirers to search for similar simple laws connecting the oscillation-frequencies. 1899Astrophysical Jrnl. IX. 213 The value of the wave-length..for hydrogen gas in vacuum tubes agrees with that deduced from Balmer's formula. 1901Proc. Amer. Acad. Arts & Sci. XXXVII. 163, I have been unable to photograph the still weaker hydrogen lines of Balmer's series. 1922[see Lyman n.]. 1958New Scientist 30 Jan. 17/3 The discharge showed Balmer lines for 20 microseconds. 1970G. K. Woodgate Elem. Atomic Struct. vi. 104 Equation (6.31) is obviously a modification of the Balmer formula for hydrogen. 1988Nature 27 Oct. 802/2 Spectra that are dominated by Balmer line emission are seen in a number of supernova remnants (SNR). |