In a hydrogen sample,if the atoms are excited | vedclass

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(C) When atoms are excited from the ground state to an excited state with principal quantum number $n = 20$,the number of possible spectral lines is g

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$190$

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(C) When atoms are excited from the ground state to an excited state with principal quantum number $n = 20$,the number of possible spectral lines is given by the formula:$N = \frac{n(n - 1)}{2}$where $n$ is the principal quantum number.Substituting the value $n = 20$ into the formula:$N = \frac{20(20 - 1)}{2}$$N = \frac{20 	imes 19}{2}$$N = 10 	imes 19 = 190$Therefore,the number of different wavelengths that may be observed in the spectrum is $190$.

In a hydrogen sample,if the atoms are excited to states with principal quantum number $n = 20$,then the number of different wavelengths which may be observed in the spectrum is:

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