question_answer

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?                [AIEEE 2005]

A) III

B) IV

C) I

D) II

Correct Answer: A

Solution :

[a] Energy involved in transition is given by

and

Thus,transition gives highest value of energy. I transition represents the absorption of energy.