 | 1974 - 64 lapas
...International System of Units is the second defined as follows: "The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition...the two hyperfine levels of the ground state of the cesium-133 atom". 2 Resolution 1 adopted by the CIPM at its meeting of 1956 and Resolution 9 of the... | |
 | 1977 - 646 lapas
...element or "natural pendulum" has been the cesium atom. One second is defined in the official wording as "the duration of 9,192,631,770 periods of the radiation...the two hyperfine levels of the ground state of the cesium-133 atom." Accordingly, the frequency of the cesium pendulum is 9,192,631,770 events per second... | |
 | Byron Emerson Blair - 1974 - 482 lapas
...XIII General Conference on Weights and Measures in 1967: "The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition...the two hyperfine levels of the ground state of the cesium133 atom" (see chap. 1). The realization of an output frequency from a real device involves several... | |
 | R. G. Liptai, Jack W. Pearson - 1975 - 350 lapas
...(adopted at 1st and 3rd CGPM 1889 and 1901) A2.12.3 second — The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition...the two hyperfine levels of the ground state of the cesium-I33 atom." (adopted at I3th CGPM 1967) A2. 12.4 ampere — The dmpere is that constant current... | |
 | 1976 - 954 lapas
...terms of a resonance of the cesium atom. The present definition of the second states, "The second is the duration of 9,192,631,770 periods of the radiation...the two hyperfine levels of the ground state of the cesium-133 atom." [13th CGPM (1967), Resolution 1] A very important change occurred when, in 1967,... | |
 | United States. Office of Naval Research - 1976 - 592 lapas
...System of Units should be the second defined as follows: "The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition...hyperfine levels of the ground state of the cesium atom 133," a definition that is still retained. MICROWAVE ABSORPTION SPECTROSCOPY Microwave absorption... | |
 | George Kamas - 1977 - 232 lapas
...element or "natural pendulum" has been the cesium atom. One second is defined in the official wording as "the duration of 9,192,631,770 periods of the radiation...the two hyperfine levels of the ground state of the cesium-133 atom." Accordingly, the frequency of the cesium pendulum is 9,192,631,770 events per second... | |
 | United States. National Bureau of Standards - 1983 - 492 lapas
...System of Units should be the second defined as follows: "The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition...hyperfine levels of the ground state of the cesium atom 133," a definition that is still retained. Microwave Absorption Spectroscopy Microwave absorption... | |
 | 1978 - 306 lapas
...comparison of the kilogram and the pound. 40-D-6331 Second.—Tke second is the duration of 9192631 770 periods of the radiation corresponding to the transition...the two hyperfine levels of the ground state of the cesium-133 atom. The second was previously defined as 1/86 400 of the mean solar day. The solar day... | |
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The second is the duration of 9, 192, 631, 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium- 133 atom (13th CGPM, 1967). 
