The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of photon with the most enegy ?

Options

A. IV
B. III
C. II
D. I

Answer

B

Explanation

`e= Rhc [(1)/( n_(1)^(2))-(1)/(n_(2)^(2))]`
E will be maximum for the transition for which `[(1)/(n_(1)^(2))-(1)/(n_(2)^(2))]` is maximum . Here `n_2` higher energy level clearly , `[ (1)/(n_1^(2) - (1)/(n_(2)^(2)))]`
is maximum for the third transition ` 2 to 1.` I transition represents the absorption of energy