Which of the following transition in H-atom corresponding to absorption line of highest frequency?

Options

A. n=1 to n=2
B. n=3 to n=4
C. n=2 to n=1
D. n=2 to n=3

Answer

A

Explanation

As the value of n increases, the energy of orbit decreases. Therefore, absorption of energy from n=1 to n=2 will have maximum energy or highest frequency of absorption line. The transition from n=2 to n=1 corresponds to emission of energy.