login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A003673 Decimal expansion of fine-structure constant alpha.
(Formerly M4325)
7
0, 0, 7, 2, 9, 7, 3, 5, 2, 5, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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

Table of n, a(n) for n=0..10.

NIST, fine-structure constant

Wikipedia, Fine-structure constant

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

EXAMPLE

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

MATHEMATICA

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

CROSSREFS

Cf. A005600, A082726.

Sequence in context: A154176 A156547 A180872 * A021141 A246948 A248283

Adjacent sequences:  A003670 A003671 A003672 * A003674 A003675 A003676

KEYWORD

cons,nonn

AUTHOR

N. J. A. Sloane, Mira Bernstein

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

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 21 13:31 EDT 2018. Contains 313954 sequences. (Running on oeis4.)