Q189 / 225 · JEE Main 2005 · Physics
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 ?


- Correct answerAIII
- BIV
- CI
- DII
Solution
$\Delta \mathrm{E} \propto\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)$
Hence, the correct answer is option: 'A'.