Question

The ionisation energy of hydrogen atom is 13.6 eV. Following Bohr’s theory, the energy corresponding to a transition between the 3rd and 4th orbit is : 

(a) 1.51 eV 

(b) 0.85 eV 

(c) 3.4 eV 

(d) 0.66 eV

Answer 1

Correct option (d) 0.66 eV

Explanation:

The ionisation energy of hydrogen atom in nth orbit is given by

Hence, energy radiated by electrons in transition from 3rd orbit to 4th orbit is