Atomic Physics · SHS2 Physics

Lesson notes

Learning Objectives

Indicator: 2.4.1.LI.3 - Identify areas of application of photoelectric effect and how they are applied.

By the end of the lesson, learners can:

Identify at least five real-world devices that operate using the photoelectric effect.
Explain how light intensity and frequency are used to trigger a response in automatic doors, burglar alarms, and other applications.
Describe the function of a photoelectric sensor in a security system, including how a change in light causes a circuit to activate.
Compare the working principles of different photoelectric applications (e.g., automatic doors versus smoke detectors versus camera light meters).
Work collaboratively in groups to classify applications according to whether they rely on the photoelectric emission of electrons or on photoconductivity.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

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.3 - Identify areas of application of photoelectric effect and how they are applied.
Suggested placement: Semester 2, Week 18 (Week 38 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.1.3
exemplars - p.141: the document prints this assessment code as 2.4.1.AS.1.3
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 self-awareness and personal growth by fostering an environment where learners feel comfortable sharing their reflections and experiences.
Assessment (2.4.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.
Teaching and Learning Resources:
- Videos
- PhET interactive simulations
- Projectors
- audio-visuals