3.2.3 Thin lenses
- Syllabus
- 0625–2026–2027
- Topic
- 3.2.3
- Level
- —
3.2.3.1—Action of thin converging and thin
- Describe the action of thin converging and thin diverging lenses on a parallel beam of light
3.2.3.2—Terms focal length, principal axis and
- Define and use the terms focal length, principal axis and principal focus (focal point)
3.2.3.3—Ray diagrams for the formation of a
- Draw and use ray diagrams for the formation of a real image by a converging lens
3.2.3.4—Characteristics of an image using the
- Describe the characteristics of an image using the terms enlarged/same size/diminished, upright/inverted and real/virtual
3.2.3.5—A virtual image is formed when
- Know: a virtual image is formed when diverging rays are extrapolated backwards and does not form a visible projection on a screen
3.2.3.6—Ray diagrams for the formation of a
- Draw and use ray diagrams for the formation of a virtual image by a converging lens
3.2.3.7—Use of a single lens as a magnifying
- Describe the use of a single lens as a magnifying glass
3.2.3.8—Use of converging and diverging lenses
- Describe the use of converging and diverging lenses to correct long-sightedness and short-sightedness
Objective notes
8 learning objectivesConceptIGCSE Physics