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Publisher Information - 17.11.2008

Physical Properties Sources Index (PPSI)

Reduced Planck Constant

Reduced Planck Constant
Definition:Defined as Planck constant ℎ over 2π: ℏ = ℎ/2π. Proportionality factor relating energy and angular frequency ω of a light quantum: E = ℏω.
ℏ = 1.054571628(53) x 10-34 J s = 6.58211899(16) x 10-16 eV s
Units:J s, eV s
Symbol:
Scope note:Present value: 2006 CODATA recommended values
Synonyms:Dirac Constant
Translation: DEReduzierte Planck-Konstante
FRConstante de Planck réduite

Sources

TitleAuthor(s)MediumLocationRankSorted ascendingQualityRatingQuantitySource typeSystems
The Nist Reference on Constants, Units and UncertaintyOnlineOnline
(Free)
11
5
Data (measured)
CRC Handbook of Chemistry and PhysicsLide D.R.OnlineOnline
(Subscription)
11
5
Data (measured)
Lange's Handbook of ChemistryDean J.A. (Ed.)OnlineOnline
(Subscription)
22
3.5
Data (measured)
Physikalisch-chemische DatenLechner M.D. (Ed.)Print303 C22
3.5
Data (measured)
Elemente, anorganische Verbindungen und Materialien, MineraleD'Ans ; Lax EllenPrint303 C22
3.5
Data (measured)
Landolt-Börnstein: New Series = Neue Serie Subvol. b: Units and Fundamental Constants in Physics and Chemistry Fundamental Constants in Physics and ChemistryBortfeldt J. ; Kramer B. (Eds.)Print9 G22
3.5
Data (measured)
SI Chemical DataAylward Gordon ; Findlay TristanPrint303 F22
3.5
Data (measured)
Conversion Tables of Units in Science and EngineeringHorvath Ari L.Print303 F33
2
Data (measured)
IUPAC Gold BookOnlineOnline
(Free)
101
0
Definition

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