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so I found a difference in what my professor wrote on the board and what I found on wikipedia... my prof said that

E=-Rhc/n^2

but wikipedia says

E=-mq^4/8(h^2)(epsilon)^2(n^2)

So if I write out the expression for R in the professor's equation, it seems that the wikipedia version doesn't include the multiplied term of 1+m_e/m_p in the denominator of the E equation... (m_e is mass of electron, m_p is mass of proton)

Which one is correct?

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# Energy of first orbital

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