SHS2 Physics · Semester 2 Week 17: Atomic Physics

Lesson notes

Learning Objectives

Indicator: 2.4.1.LI.1 - Explain photoelectric effect and wave-particle duality.

By the end of the lesson, learners can:

Explain the photoelectric effect as the emission of electrons from a metal surface when light of sufficient frequency shines on it.
Describe the key features of wave-particle duality, recognising that light behaves as both a wave and a stream of particles (photons).
Use the photon concept to explain why dim light of a high frequency can cause electron emission while bright light of a low frequency cannot.
Work collaboratively in mixed groups to critique and refine explanations of photoelectric effect observations using both wave and particle models.
Use digital resources (videos and PhET simulations) to observe and describe the photoelectric effect and relate their observations to the concept of wave-particle duality.

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Curriculum details

Strand: Atomic and Nuclear Physics (Strand 4)
Sub-strand: Atomic Physics (4.1)
Content standard: 2.4.1.CS.1 - Demonstrate knowledge and understanding of photoelectric effect. 2.4.1.LO.1 Appreciate its application in the operation of automatic doors and security setups. Explain photoelectric effect and appreciate its application in the operation of automatic doors and security setups.
Indicator: 2.4.1.LI.1 - Explain photoelectric effect and wave-particle duality.
Suggested placement: Semester 2, Week 17 (Week 37 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 141

Exemplars (from the NaCCA curriculum)

Experiential Learning: Let learners watch videos on photoelectric effect and its applications.
Encourage diverse perspectives and contributions.
Assessment (2.4.1.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.
Teaching and Learning Resources:
- Videos
- PhET interactive simulations
- Projectors
- audio-visuals