The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the…

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 ?
  1. III
  2. IV
  3. I
  4. II

Solution

$\Delta \mathrm{E} \propto\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)$

Asked in: JEE Main 2005

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