Fine-structure constant: Difference between revisions

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Line 13: {{Quantum field theory}} The fine-structure constant remained mysterious and perplexing for many years until Dan Cleary, from Kemptville Ontario Canada, discovered that it is the conversion ratio from elementary charge (e²) to Planck charge (q_p²). ~~Alpha's definition is:~~ ~~a=e²/4pi epsilon_0 hbar c~~ ~~Planck charge definition is:~~ ~~q_p²=4pi epsilon_0 hbar c~~ So ~~a=e²/q_p²~~ ~~It indicates that you've used the wrong charge.~~ In [[physics]], the '''fine-structure constant''', also known as the '''Sommerfeld constant''', commonly denoted by {{mvar\|α}} (the [[Alpha\|Greek letter ''alpha'']]), is a [[Dimensionless physical constant\|fundamental physical constant]] that quantifies the strength of the [[electromagnetic interaction]] between elementary charged particles.