Atomic Physics · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.4.1.LI.2 - State the laws of photoelectric effect

By the end of the lesson, learners can:

State all four laws of photoelectric effect in their own words without referring to notes.
Explain the relationship between the intensity of incident light and photoelectric current using the laws.
Describe how the frequency of incident light affects the maximum kinetic energy of emitted photoelectrons.
Justify why a dim light of high frequency can eject electrons while a bright light of low frequency cannot, using the laws of photoelectric effect.
Relate the laws of photoelectric effect to the wave theory of light and identify where the wave theory fails.

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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.2 - State the laws of photoelectric effect
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.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

indicator text - p.141: the document prints this learning indicator code as 2.4.1.LI.1.2
exemplars - p.141: the document prints this assessment code as 2.4.1.AS.1.2
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.2). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Videos
- PhET interactive simulations
- Projectors
- audio-visuals