The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A005600 Decimal expansion of reciprocal of fine-structure constant alpha. (Formerly M2606) 11
 1, 3, 7, 0, 3, 5, 9, 9, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 3,2 COMMENTS The fine-structure "constant" actually isn't a constant, it depends on the energy at which it is measured: Its value is known to approach 1/128 at interaction energies above 80 GeV. For other considerations, e.g., whether the value of the fine-structure constant differs by location and over time, see the Wikipedia article or other links. - M. F. Hasler, Oct 30 2013 REFERENCES John Barrow, The Constants of Nature, 367 pp., Jonathan Cape, 2002. K. R. Lang, Astrophysical Data: Planets and Stars, Springer-Verlag, NY, 1991. Martin J. Rees, Just Six Numbers: the deep forces that shape the universe, Phoenix, 1999. N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Table of n, a(n) for n=3..11. E. R. Cohen and B. N. Taylor, The 1986 adjustment of the fundamental physical constants, Rev. Modern Phys., 59 (1987), 1121-1148. Morel, L., Yao, Z., Cladé, P. et al. Determination of the fine-structure constant with an accuracy of 81 parts per trillion. Nature 588, 61-65 (2020). doi:10.1038/s41586-020-2964-7 Robert P. Munafo, Notable Properties of Specific Numbers. NIST, inverse fine-structure constant Wikipedia, Fine-structure constant FORMULA 1/alpha = 1/A003673. 1/alpha = c/V_n1 = A003678/A081800. - Omar E. Pol, Mar 11 2018 EXAMPLE 1/alpha = 137.035999206(11) [Morel et al., 2020] CROSSREFS Cf. A003673, A082726. Sequence in context: A127584 A124919 A033920 * A180873 A021031 A291835 Adjacent sequences: A005597 A005598 A005599 * A005601 A005602 A005603 KEYWORD cons,nonn AUTHOR N. J. A. Sloane, Mira Bernstein EXTENSIONS Updated May 20 2003 Updated by Omar E. Pol, Aug 09 2009 Updated by Raphie Frank, Dec 13 2012 Updated by Arkadiusz Wesolowski, Feb 08 2016 Updated by Rémy Sigrist, Dec 05 2020 Dropped the digits that could change with 1 standard error variation of the value provided by CODATA - Andrey Zabolotskiy, Dec 12 2020 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 7 13:22 EDT 2024. Contains 375730 sequences. (Running on oeis4.)