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Q.
The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy?
Atoms
Solution:
$I^{st}$ transition is showing absorption of a photon. From rest of three transitions, $III$ is having maximum energy from level $n = 2$ to $n = 1$
$\Delta E\propto (\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}})$
