Question

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

• A. velocity of electron undergoing transition
• B. number of elctrons undergoing transition
• C. the difference in energy levels involved in the transition
• D. none of these

Answer 1

The correct option is C the difference in energy levels involved in the transition

$\Delta E=hv=\frac{hc}{\lambda }$

$\lambda =\frac{hc}{\Delta E}\Rightarrow \lambda \propto \frac{1}{\Delta E}$