of the following transitions in the hydrogen atom, the one which gives an emission line of the highest frequency?

Options

A. n = 3 to n = 10
B. n = 10 to n = 3
C. n = 1 to n = 2
D. n = 2 to n = 1

Answer

D

Explanation

Radiation are absorbed in option (A) and (C) and the energy of emitted radiation `E prop (1)/("Difference of orbit")` and as the difference between orbit n = 10 to n = 3 increases energy will be less, when the difference between orbits n = 2 to n = 1 decreases the energy emitted will be large and energy frequency in n = 2 to n = 1, highest frequency will be emitted.