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In the above question `(Q,63)` the number of spectral lines orbitals in Bohr spectrum of hydrogen atom when an electron is excited from 2nd orbit to 5

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In the above question `(Q,63)` the number of spectral lines orbitals in Bohr spectrum of hydrogen atom when an electron is excited from 2nd orbit to 5th arbit,is
A. 3
B. 6
C. 10
D. 5
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Correct Answer - B
Number of spectral from `n_(1)` to `n_(2)`
`= ((n_(2) - n_(1) + 1)(n_(2) - n_(1)))/(2) = ((5 - 2 + 1)(5-2))/2 =6`
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