And that's because electrons do not actually occupy these perfect or circular and spherical orbits. Now, Schrodinger described a pathway that our electrons follow using wave equations. So in other words, our electrons follow certain orbits, certain pathways that are not circular. And what this person did is he described the pathways that they take using wave equations. Now, wave equations are simply mathematical representations of the pathways that our electrons do take. And just like any simple equation, we can also solve wave equations for solutions.