55 



TABLE 28.— GENERAL PHYSICAL CONSTANTS ACCORDING TO BEARDEN 

 AND ASSOCIATES (concluded) 



Energy equivalent of electron mass. . .mc 2 = (.510969 ± .000009) Mev 



Energy associated with 1°K 



(Ro/F) X 10" 8 = (8.61632 ± .00042) X K)- 5 ev 



Temperature associated with 1 ev To = (11605.9 ± .6) deg K 



Grating space calcite at 20°C d 2 » — (3.03567 ± .00005) X 10" 8 cm 



Density of calcite at 20°C P= (2.71030 ± .00003) gem" 3 



Compton wavelength of electron h/mc — (2.426045 ± .000025) X 10; Io cm 



Zeeman displacement j)er gauss c/(4ir»ic) = (4.668885 ± .00008) X 10" 5 cm" 1 gauss" 1 

 Doublet separation in hydrogen 



4r R„ a 2 — (.3649900 ± .0000037) cm" 1 

 16 



SMITHSONIAN PHYSICAL TABLES 



