question_answer

Which of the following transition will have highest emission wavelength                                               [BHU 2003]

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

B)            \[n=1\text{ to }n=2\]

C)            \[n=2\text{ }\,\text{to}\,\,n=5\]                                    

D)            \[n=5\text{ to }n=2\]

Correct Answer: D

Solution :

                   \[\because \ {{E}_{2}}<{{E}_{1}}\]Þ \[{{\lambda }_{2}}>{{\lambda }_{1}}\]