SHS3 Physics · Semester 1 Week 17: Wave

Lesson notes

Learning Objectives

Indicator: 3.2.2.LI.2

By the end of the lesson, learners can:

Describe the basic structure of a laser, naming the three essential components (active medium, energy source, and optical cavity) and their functions.
Explain the process of stimulated emission and how it produces a coherent beam of light.
Describe the steps involved in the production of a laser beam, from energy absorption to the emission of coherent light.
Differentiate between spontaneous emission (ordinary light) and stimulated emission (laser light) using simple diagrams or descriptions.
Identify at least three real-world applications of lasers and connect them to the properties of laser light (coherence, monochromaticity, and directionality).

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Curriculum details

Strand: Energy (Strand 2)
Sub-strand: Wave (2.2)
Content standard: 3.2.2.CS.2 - Demonstrate knowledge and understanding of lasers 3.2.2.LO.2 Explain the production and working principles of lasers.
Indicator: 3.2.2.LI.2 - Describe the production of a laser beam.
Suggested placement: Semester 1, Week 17 (Week 17 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.168: the document prints this learning indicator code as 3.2.2.LI.1.2
exemplars - p.168: the document prints this assessment code as 3.2.2.AS.1.2
Curriculum reference: NaCCA curriculum document, p. 168

Exemplars (from the NaCCA curriculum)

Experiential learning: Let learners to watch a video/simulation to see how lasers are produced.
Assessment (3.2.2.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.
Teaching and Learning Resources:
- Audio-visuals
- Internet
- projectors
- YouTube
- Interactive virtual laboratory