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A081820
Decimal expansion of the Stefan-Boltzmann constant sigma in the 2019 SI system in units Watt/(m^2*K^4).
0
5, 6, 7, 0, 3, 7, 4, 4, 1, 9, 1, 8, 4, 4, 2, 9, 4, 5, 3, 9, 7, 0, 9, 9, 6, 7, 3, 1, 8, 8, 9, 2, 3, 0, 8, 7, 5, 8, 4, 0, 1, 2, 2, 9, 7, 0, 2, 9, 1, 3, 0, 3, 6, 8, 2, 4, 0, 5, 4, 6, 1, 7, 3, 7, 0, 5, 3, 9, 4, 8, 1, 6, 0, 6, 2, 6, 5, 2, 3, 3, 2, 6, 0, 8, 2, 5, 7, 1, 8, 5, 7, 7, 7, 0, 4, 4, 6, 8, 8, 7, 0, 3
OFFSET
-7,1
COMMENTS
From Jeremy Tan, Jun 13 2019: (Start)
The Stefan-Boltzmann law states that for a black body with temperature T, its radiant emittance j* (power radiated per unit area) is sigma * T^4.
In SI units, all the values in the defining relation in the Formula section are fixed as of May 20 2019 (see the BIPM link), so this constant is also fixed. (End)
FORMULA
sigma = 5.6703744... * 10^-8 W m^-2 K^-4
Equals A222609*A070063^4/(A003676^3*A003678^2).
MATHEMATICA
First@ RealDigits@ N[2 Pi^5 (1380649 10^-29)^4 / (15 (662607015 10^-42)^3 299792458^2), 120] (* Jeremy Tan, Jun 13 2019 *)
CROSSREFS
Fixed SI constants used in deriving this constant: A003676 (h), A003678 (c), A070063 (k).
Sequence in context: A232247 A200110 A189240 * A306324 A214681 A019978
KEYWORD
nonn,cons
AUTHOR
Benoit Cloitre, Apr 10 2003
EXTENSIONS
Edited by Andrey Zabolotskiy, Jun 23 2017
Updated to 2019 SI by Jeremy Tan, Jun 13 2019
STATUS
approved