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Qmechanic ♦
Qmechanic ♦
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fine Fine structure constant definition

the fine structure constantThe fine structure constant is usually defined using e$e$,h $h$ ,c$c$ ... However, from QED, we know it cannot be derived but only experimentally measured. Does that mean the usual definition we use in terms of quantities we know is not precise or it simply says that same as the fine structure constant, e$e$,h $h$ ,c$c$ values can only be experimentally measured.

fine structure constant definition

the fine structure constant is usually defined using e,h,c... However, from QED, we know it cannot be derived but only experimentally measured. Does that mean the usual definition we use in terms of quantities we know is not precise or it simply says that same as the fine structure constant, e,h,c values can only be experimentally measured.

Fine structure constant definition

The fine structure constant is usually defined using $e$, $h$ ,$c$ ... However, from QED, we know it cannot be derived but only experimentally measured. Does that mean the usual definition we use in terms of quantities we know is not precise or it simply says that same as the fine structure constant, $e$, $h$ ,$c$ values can only be experimentally measured.

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Shadumu
Shadumu
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fine structure constant definition

the fine structure constant is usually defined using e,h,c... However, from QED, we know it cannot be derived but only experimentally measured. Does that mean the usual definition we use in terms of quantities we know is not precise or it simply says that same as the fine structure constant, e,h,c values can only be experimentally measured.