光速
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《》中記載的實驗建基於羅默於1676年11月呈交法國科學院的一份報告(Cohen, 1940, p. 346)。
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↑  Penzes, WB.  (PDF). NIST. 2009  [2010-01-11]. （原始内容存档 (PDF)于2011-10-19）.
↑  
Adams, S. . CRC Press. 1997: 140. ISBN 0-7484-0621-2. One peculiar consequence of this system of definitions is that any future refinement in our ability to measure c will not change the speed of light (which is a defined number), but will change the length of the meter!
↑  
Rindler, W.  2nd. Oxford University Press. 2006: 41. ISBN 0-19-856731-6. Note that [...] improvements in experimental accuracy will modify the meter relative to atomic wavelengths, but not the value of the speed of light!
↑  The "explicit-constant" formulation 的存檔，存档日期2014-08-11., BIPM 2011