1/l = R ( 1/ m ( do kwadratu ) - 1/n (do kwadratu )      n= ? T= 2 (PI)  Pierwiastek l - d  / g                                  d= ?  

[latex]1/l = R(1/m^{2} - 1/n^{2}) 1/Rl = 1/m^{2} - 1/n^{2} 1/n^{2} = (Rl - m^{2})/Rlm^{2} n^{2} = Rlm^{2}/(Rl - m^{2}) n = msqrt{Rl/(Rl - m^{2})} --------------------------------------- T = 2 pi sqrt{(l-d)/g} gT^{2} = 4 pi ^{2} * (l-d)/g gT^{2} = 4 pi ^{2}l - 4 pi ^{2}d 4 pi ^{2}d = 4 pi ^{2}l - gT^{2} d = 4 pi ^{2}l/4 pi ^{2} - gT^{2}/4 pi ^{2} d = l - gT^{2}/4 pi ^{2} [/latex]