The energy levels of a hypothetical one electron atom system are given by En =-16/n2 eV, where n = 1, 2, 3,….The wavelength of emitted photon corresponding to transition from first excited level to ground level is about :
(A) 690 Å
(B) 1035 Å
(C) 1220 Å
(D) 3650 Å
