3.2.3 — Thin lenses

Core

• 3.2.3.1 — Describe action of thin converging and diverging lenses on a parallel beam
• 3.2.3.2 — Define and use focal length, principal axis and principal focus
• 3.2.3.3 — Draw and use ray diagrams for real images formed by a converging lens
• 3.2.3.4 — Describe image characteristics using enlarged/same size/diminished, upright/inverted, real/virtual
• 3.2.3.5 — Know a virtual image is formed by extrapolating diverging rays backwards

Supplement

• 3.2.3.6 — Draw ray diagrams for virtual images formed by a converging lens
• 3.2.3.7 — Describe use of a single lens as a magnifying glass
• 3.2.3.8 — Describe use of converging and diverging lenses to correct long- and short-sightedness