Appendix A:     Afterword

The concepts in Section 17.6 are presented as what’s required by the H2 syllabus. They do not represent the most up-to-date understanding of the subject by current physicists[1]. They are more like snapshots of some of the major experimental observations and theoretical interpretations during the early days of modern physics.

Understandably, many students are unconvinced about many concepts, especially the wave-particle duality and heisenberg’s uncertainty principle (HUP). Unfortunately, to fully explain the current state of understanding is not a trivial undertaking. If you’re interested, I strongly encourage you to read “How to Teach Quantum Physics to Your Dog” by Chad Orzel. It is written in a humorous but nevertheless conceptually accurate manner, which should help you attain some degree of closure.

[1] For example, HUP has been refined to be DxDp h/4p, Bohr’s orbital electrons have been superseded by probabilistic “electron clouds”, and wave-particle duality has been given a new meaning by Schrodinger Equation’s wave-function.

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