1. Module 6

Introduction

Module 6—Wave-Particle Duality and Quantum Physics

 

Module Introduction

 

In Module 5 you looked at many experiments that proved that electromagnetic radiation (EMR) behaves like a wave. In the late 1800s and into the 1900s new experiments showed that the behavior of EMR was more complex than initially believed. Scientists built upon their previous knowledge to develop a new model for light and the behaviour of atoms as physics transitioned from classical physics to quantum physics.

 

In Module 6 you will learn about the idea of the quantum. You will see some of the work done by Planck, Einstein, Millikan, and de Broglie. You will also be introduced to the wave-particle duality of electromagnetic radiation.

 

In Module 6 evidence related to the quantum model and wave-particle duality will be explored in relation to

  • blackbody radiation and the photon as a quantum of EMR

  • the photoelectric effect and the conservation of energy

  • the Compton effect and the conservation of momentum and energy

This will be explored by looking at experimental evidence provided by blackbody radiation and the introduction of the quantum by Planck; the photoelectric effect experiment by Einstein; the momentum of photons by Compton; and matter waves by de Broglie, Davisson, Germer, and G.P. Thomson.