The frequency of \( 1^{\text {st }} \) line of Balmer series in \( \mathrm{H}_{2} \) atom is \( ... VIDEO
The frequency of \( 1^{\text {st }} \) line of Balmer series in \( \mathrm{H}_{2} \) atom is \( f_{0} \). The frequency of line emitted by singly ionised He atom is
[CPMT 2002]
(a) \( 2 f_{0} \)
(b) \( 4 f_{0} \)
(c) \( f_{0} / 2 \)
(d) \( f_{0} / 4 \)
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