Question

The wavelength of a spectral line for an electronic transition is inversely related to

• A. the number of electrons undergoing the transition
• B. the nuclear charge of the atom
• C. the difference in the energy of the energy levels involved in the transition
• D. the velocity of the electron undergoing the transition

Answer 1

Answer: (C)

the difference in the energy of the energy levels involved in the transition

Answer 2

Transition energy $(\Delta E) =kZ^2 \bigg(\frac{1}{n_1^2} - \frac{1}{n_2^2}\bigg) =\frac{hc}{\lambda}$
i.e. \hspace20mm \Delta E \frac{1}{\lambda}