question_answer

Which of the following transitions in a hydrogen atom emits photon of the highest frequency [MP PET 1996; DPMT 2001]

A)            n = 1 to n = 2                        

B)            n = 2 to n = 1

C)            n = 2 to n = 6                        

D)            n = 6 to n = 2

Correct Answer: A

Solution :

                   \[\because {{E}_{1}}>{{E}_{2}}\] \[\therefore {{\nu }_{1}}>{{\nu }_{2}}\]      i.e. photons of higher frequency will be emitted if transition takes place from n = 2 to 1.