question_answer

Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths \[r={{\lambda }_{1}}/{{\lambda }_{2}},\]is given by:                   [JEE Main 2017]

A) \[r=\frac{3}{4}\]

B) \[r=\frac{1}{3}\]

C) \[r=\frac{4}{3}\]

D) \[r=\frac{2}{3}\]

Correct Answer: B

Solution :

[b]

For

For