Question

The wave length of a spectral line for an electronic transition is inversely proportional to :

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

Answer 1

Answer: (D)

the difference in the energy involved in the transition

The wave length of a spectral line for an electronic transition is inversely proportional to the difference in the energy involved in the transition.
$\Delta E=E_2-E_1=\frac{hc}{\lambda }$
$\lambda \propto \frac{1}{\Delta E}$