Wave · SHS3 Physics

Lesson notes

Learning Objectives

Indicator: 3.2.2.LI.2 - Describe how images are formed by lenses.

By the end of the lesson, learners can:

Trace the paths of the three principal rays (parallel ray, focal ray, and centre ray) through a converging lens to locate the position of an image.
Describe the characteristics of images formed by a converging lens for objects placed at different distances (beyond 2F, at 2F, between F and 2F, at F, and between F and the lens).
Trace the paths of rays through a diverging lens and state the characteristics of the images formed.
Use ray diagrams to distinguish between real and virtual images and between upright and inverted images.
Explain, in their own words, how the eye and a simple camera use lenses to form images on a screen.

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: Energy (Strand 2)
Sub-strand: Wave (2.2)
Content standard: 3.2.2.CS.1 - Demonstrate knowledge and understanding of lenses 3.2.2.LO.1 Use the working principles of lenses to explain the operation of some optical instruments.
Indicator: 3.2.2.LI.2 - Describe how images are formed by lenses.
Suggested placement: Semester 1, Week 15 (Week 15 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. 167

Exemplars (from the NaCCA curriculum)

Collaborative learning: Let learners to watch a video/simulation to see how lenses form images and identify and note the rays that are involved in the image formation process after watching the video.
Engage with inclusive resources and role models in physics.
Assessment (3.2.2.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:
- Audio-visuals
- Internet
- Projectors
- YouTube
- Interactive
- Reference virtual laboratory books