Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
physical phenomenon
|
| gptkbp:alsoKnownAs |
alpha
|
| gptkbp:appearsIn |
atomic physics
quantum electrodynamics fine structure of atomic spectra |
| gptkbp:c |
speed of light in vacuum
|
| gptkbp:category |
fundamental physical constant
|
| gptkbp:describes |
strength of electromagnetic interaction
|
| gptkbp:dimensions |
true
|
| gptkbp:e |
elementary charge
|
| gptkbp:form |
α = e²/(4πε₀ħc)
|
| gptkbp:hasUnit |
dimensionless
|
| https://www.w3.org/2000/01/rdf-schema#label |
Fine-structure constant
|
| gptkbp:introduced |
gptkb:Arnold_Sommerfeld
|
| gptkbp:relatedTo |
characterizes electromagnetic coupling strength
determines splitting of spectral lines |
| gptkbp:studiedIn |
atomic physics
physics quantum mechanics |
| gptkbp:symbol |
α
|
| gptkbp:valuation |
0.0072973525693
1/137.035999084 (CODATA 2018) approximately 1/137 |
| gptkbp:ħ |
gptkb:reduced_Planck_constant
|
| gptkbp:ε₀ |
vacuum permittivity
|
| gptkbp:bfsParent |
gptkb:Physics
|
| gptkbp:bfsLayer |
4
|