The frequency of 1st line of Balmer series in ${\mathrm{H}}_{2}$ atom is ${\mathrm{v}}_{0}$. The frequency of line emitted by singly ionised He atom is

(a) 2${\mathrm{v}}_{0}$           (b) 4${\mathrm{v}}_{0}$
(c) ${\mathrm{v}}_{0}$/2          (d) ${\mathrm{v}}_{0}$/4

Explanation is a part of a Paid Course. To view Explanation Please buy the course.

Difficulty Level: