Chemistry

Problem

The shortest wavelength of hydrogen atom in Lyman series is

\lambda

. The longest wavelength in Balmer series of

\text{He}^+

is (a)

\frac{5}{9\lambda}

(b)

\frac{9\lambda}{5}

(c)

\frac{36\lambda}{5}

(d)

\frac{5\lambda}{9}