Schrödinger’s equation from Snell’s law

Author:

Lima NathanORCID,Karam RicardoORCID

Abstract

Abstract A new derivation of Schrödinger’s equation is presented, based on Schrödinger’s original discussions on refraction and the optical-mechanical analogy, but adopting a much simpler formalism: Newtonian mechanics and some basic elements of classical wave theory (such as Snell’s law). We compare how particles and waves refract and show that the ‘law of particle refraction’ and the ‘law of wave refraction’ may become consistent if one assumes that a particle can be represented by a wave group. In this case, the differential equation whose solutions represent the waves forming such wave group is the Schrödinger equation. Due to the simplicity of the adopted mathematical formalism, we argue that this derivation can be used in quantum mechanics courses at introductory level to give students an idea of Schrödinger’s original path to his wave equation.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference23 articles.

1. De Broglie’s relativistic phase waves and wave groups;Brown;Am. J. Phys.,1984

2. XXXV. A tentative theory of light quanta;de Broglie;London, Edinburgh Dublin Phil. Mag. J. Sci.,1924

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