Q: ν1 is the frequency of the series limit of Lyman series, ν2 is the frequency of the first line of Lyman series and v3 is the frequency of the series limit of the Balmer series. Then

(a) ν_{1} – ν_{2} = ν_{3}

(b) ν_{1} = ν_{2} – ν_{3}

(c) 1/ν_{2} = 1/ν_{1} + 1/ν_{3}

(d) 1/ν_{1} = 1/ν_{2} + 1/ν_{3}

Ans: (a)