### Introduction

With terms like quantum teleportation or quantum computers, the fascinating world of quantum mechanics has gained an unprecedented popularity. Already in the near future, quantum phenomena will become increasingly important in the fields of micro-electronics or nanotechnology. Therefore, a certain basic knowledge of quantum mechanical ideas and concepts has more and more become a valuable part of general education.

The knowledge of a modern wave-mechanical model of the hydrogen atom is certainly an important educational goal. This course will help you to reach this goal in a comparatively simple way, because the abstract mathematical theory has been replaced by colorful visualizations and animations. Therefore, this collection of learning objects is also suited for use at secondary high schools.

This course starts by repeating the basic notions for describing classical waves and particle beams, because these ideas get a new interpretation in quantum mechanics. Quantum mechanics starts with a discussion of the double-slit experiment (in a schematic and abstract form), which is used to motivate the wave model of de Broglie. Then you will learn about the motion of wave packets and the statistical interpretation of quantum mechanics. The theory of the hydrogen atom then follows from an analysis of the possible motions of wave packets in the Coulomb field of an atomic nucleus. It is possible to recognize the quantum numbers of the hydrogen states directly from the visualizations of the wave function.