For some unknown reason, my 6 kilogram physics textbook doesnt explain the formula:(adsbygoogle = window.adsbygoogle || []).push({});

(me^4 / 8e0^2 h^2 ) x 1/ n^2

Where n is the state number.

Im just wondering what the me is, it is not m(subscript e) but just me both lowercase, e0 is greek epsilon subscript zero.. Could someone help me out, thanks

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# Basic Formula?

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