FIG. 8-10 Electron orbits in the Bohr model of the hydrogen atom (not to scale). The radius of each orbit is proportional to n2, the square of the orbit's quantum number. The inner orbit is the electron's normal path, and the outer orbits represent states of higher energy. If the electron absorbs enough energy to jump to an outer orbit, it will return to the n = 1 orbit by a single jump or combination of jumps. Each inward jump is accompanied by the emission of a photon.