question_answer

An electron of an atom transits from\[{{n}_{1}}\], to \[{{n}_{2}}\] . In which of the following, maximum frequency of photon will be emitted?

A) \[{{n}_{1}}=1\,to\,{{n}_{2}}=2\]               

B)  \[{{n}_{1}}=2\,\,to\,\,{{n}_{2}}=1\]

C) \[{{n}_{1}}=2\,\,to\,\,{{n}_{2}}=6\]         

D) \[{{n}_{1}}=6\,\,to\,\,{{n}_{2}}=2\]

Correct Answer: B

Solution :

As\[{{E}_{1}}>{{E}_{2}}\] \[\therefore \]\[{{v}_{1}}>{{v}_{2}}\] \[ie\], photons of higher frequency will be emitted if transition takes place from\[n=2\]to\[n=1\].