Quantum Physics - Unit Summary
16 lessons, 1 hour each
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Lesson 4 – The nature of light – wave particle duality?
After these lessons students will be able to:
- Explain how light propagates in ways that can be modelled as a particle or a wave (e.g. double slit experiment and photoelectric effect).
- Explain the photoelectric effect and its influence on the wave models of light.
- Describe why the debate over the nature of light was so important.
- The experimental evidence (double slit experiment and photoelectric effect) confirmed that light can behave as either a wave or a particle.
- The wave duality debate led to the foundation and study of quantum mechanics providing new understandings of matter.
Learning SequenceShow all resources
Welcome students to this lesson and encourage several of the students to introduce themselves to each other.
Investigation – Teacher introduces students to the historical debate of light behaving as a wave or as a particle. The experimental evidence provided from Young’s double slit experiment and Einstein’s photoelectric effect is examined, compared and its implications discussed.
Reflection – Teachers stage a debate taking a side and present the experimental evidence for either model of light. Students respond with questions to clarify their ideas.
Investigation – Teacher introduces the construct of energy level diagrams. See the key ideas covered in Prezi L4.2 Energy level diagrams. Resources
Reflection – Teacher discusses the purpose of the short quiz to help consolidate understanding. Resources
Students undertake a short quiz 4.2.1 which reviews the key ideas taught in this lesson. Resources
Students continue researching their poster topics and investigate the particle tracks available from the Nova website ‘Pictures of Atom Smashers’. Resources
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