 | John Oatley, Sir Charles William Oatley - 1976 - 276 sider
...units of length, mass and time are defined as follows. The metre is the length equal to 1 650763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p10 and 5ds of the krypton-86 atom. Distances of the order of a metre can be measured in terms of... | |
 | James R. Wertz - 1978 - 886 sider
...for example, NBS Special Publication 330 [NBS, 1974]): The metre is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p|0 and 5d5 of the krypton-86 atom. The kilogram is the mass of the international prototype of the... | |
 | S. K. Dogra, S. Dogra - 1984 - 694 sider
...According to SI, the unit for distance is 'metre (m)', defined as the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p,0 and 5d6 of the krypton-86 atom. The SI unit of area is the square metre (m2). Land is often measured... | |
 | C Venkatramaiah - 1995 - 1078 sider
...quantity. The base units of SI System are as follows: Length The metre is the length equal to 1,650,763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2pl° and 5cf of the Krypton-86 atom. Mass The Kilogram is the unit of mass; it is equal to the mass... | |
 | United States. National Bureau of Standards - 1986 - 880 sider
...desirable to adopt a natural and indestructible standard. "The meter is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2 p,0 and 5 d5 of the krypton 86 atom." 15th CGPM, 1975: considering the excellent agreement among... | |
 | James W. Robinson - 1991 - 958 sider
...abrogated as the international standard of length, and the meter was redefined as equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the 2p, 0 and 5d 5 levels of the krypton-86 atom. ‘ Since thefl the wavelength of this orange-red line... | |
 | Frank A. Paine, Heather Y. Paine - 1992 - 516 sider
...whilst the metre was defined by an International Conference in October 1960 as 'equal to 1650763.73 wavelengths, in vacuum, of the radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton-86 atom'. This can be determined to an accuracy of one part in 108. Thus,... | |
 | Adventure - 1992 - 66 sider
...adopt a natural and indestructible standard, decides 1. The meter is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2pw and 5d5 of the krypton 86 atom.* 2. The definition of the meter in force since 1889, based on the... | |
 | M. M. Malhotra, R. Subramanian - 1994 - 586 sider
...and defined below: — (i) Unit of Length — Metre (m) The metre is the length equal to 1650763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2P10 and 5i/5 of krypton-86 atom, (ii) Unit of Mass — Kilogram (kg) The kilogram is the unit of mass... | |
 | National Institute of Standards and Technology - 1995 - 250 sider
...associated with artifacts. From 1960 to 1983, the meter was defined as the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the specified energy levels of the krypton 86 atom. Since 1983 the meter has been defined as the length... | |
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The meter is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton-86 atom. 
