Both models present a picture in which oppositely charged particles have a potential energy of zero at infinite separation, with negative values reflecting decreasing potential energy as the electron and nucleus come nearer together.
How is the Bohr model different than the classical model described in the formula above? If the nucleus and electron of a hydrogen atom comprised a 'classical' rather than a quantized electrodynamic system, the potential energy function of an electron would be a continuous, and the emission spectrum, which derives from internal energy changes, would be continuous like a rainbow. On the contrary, however, the observed emission spectrum is a line spectrum corresponding to quantized energy levels for the electron within the atom.
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