A003673 Decimal expansion of fine-structure constant alpha.

0, 0, 7, 2, 9, 7, 3, 5, 2, 5, 6

Offset: 0

Author

N. J. A. Sloane, Mira Bernstein

Keywords

• cons
• nonn

Examples

			alpha = 7.29735256... * 10^-3 = 0.00729735256...
		

References

• John Barrow, The Constants of Nature, 367pp, Jonathan Cape, 2002.
• H. J. Fischbeck and K. Fischbeck, Formulas. Facts and Constants, Springer-Verlag, NY, 2nd ed., 1987.
• 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

• NIST, fine-structure constant
• Wikipedia, Fine-structure constant

Crossrefs

Cf. A005600, A082726.

Programs

Mathematica

UnitConvert[Quantity["FineStructureConstant"]] (* requires Mathematica 9+; Andrey Zabolotskiy, Aug 15 2016 *)

Formula

alpha = e^2/(4*Pi*E*h*c), where e is the elementary charge (A081823), E is the electric constant (A081799), h is the reduced Planck constant (A254181), c is the speed of light (A003678). - Ilya Gutkovskiy, Jul 27 2016

alpha = V_n1/c = A081800/A003678. - Omar E. Pol, Mar 11 2018

Extensions

Updated May 20 2003

Updated by Omar E. Pol, Aug 09 2009, R. J. Mathar, Dec 15 2012

Updated by Arkadiusz Wesolowski, Feb 08 2016

Definition edited by N. J. A. Sloane, Feb 11 2016