For which transition of He+ spectrum energy will be same as 2nd line of Balmer series of H spectrum?
n1=4 to n2=8
n1=2 to n2=4
n1=3 to n2=4
n1=4 to n2=5
for 2nd line in Balmer series of hydrogen atom ¯¯¯v = 3R16;
for helium ion = ¯¯¯v = 4 × R[116 − 164] = 4R × 364 = 3R16
What electronic transition in Li+2 produces the radiation of the same wave length as the first Line in the Lyman series of hydrogen?