1.

      Which one among the following transitions of electron of hydrogen atom emits radiation of the shortest wavelength?  [NDA]

A. n = 2 to n = 1   
B.       n = 3 to n = 2
C. n = 4 to n = 3   
D.       n = 5 to n = 4
Answer» B.       n = 3 to n = 2


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