The shortest wavelength of the Brackett series of hydrogen like atom (atomic number =Z) is the same as the shortest wavelength of the Blamer series of hydrgeon atom . The value ofn Z is

Options

A. 4
B. 2
C. 3
D. 6

Answer

B

Explanation

`R [(1)/(1^(2)) - (1)/(oo^(2))] = R Z^(2) [(1)/(2^(2)) - (1)/(oo^(2))] or Z = 2`