Let \( v_{1} \) be the frequency of the series limit of the Lyman series, \( v_{2} \) be the fre...

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Let \( v_{1} \) be the frequency of the series limit of the Lyman series, \( v_{2} \) be the frequency of the first line of the Lyman series, and \( v_{3} \) be the frequency of the series limit of the Balmer series :
(a) \( v_{1}-v_{2}=v_{3} \)
(b) \( v_{2}-v_{1}=v_{3} \)
- (c) \( v_{3}=1 / 2\left(v_{1}-v_{3}\right) \)
(d) \( v_{1}+v_{2}=v_{3} \)
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