Hydrogen Atom Ionization Wavelength · CAP 2007 #16
Physics · modern-physics
Problem
According to the Bohr model of the atom, an electron can undergo a transition from one orbit that is closer to the nucleus to another which is farther from the nucleus, by absorbing a photon whose energy E depends on its frequency f as E = hf, where h is Planck's constant. An energy of 13.6 eV is needed to ionize a hydrogen atom by ejecting an electron from the lowest energy level. What is the longest wavelength of a photon that can eject the electron from the lowest energy level of the atom?
(a) 40 nm;
(b) 60 nm;
(c) 70 nm;
(d) 80 nm;
(e) 90 nm.