What you’ll learn8 learning objectivesChoose one objective for a focused lesson, or study the complete topic.3.2.3.1Action of thin converging and thin• Describe the action of thin converging and thin diverging lenses on a parallel beam of lightSyllabus objective3.2.3.2Terms focal length, principal axis and• Define and use the terms focal length, principal axis and principal focus (focal point)Syllabus objective3.2.3.3Ray diagrams for the formation of a• Draw and use ray diagrams for the formation of a real image by a converging lensSyllabus objective3.2.3.4Characteristics of an image using the• Describe the characteristics of an image using the terms enlarged/same size/diminished, upright/inverted and real/virtualSyllabus objective3.2.3.5A 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 screenSyllabus objective3.2.3.6Ray diagrams for the formation of a• Draw and use ray diagrams for the formation of a virtual image by a converging lensSyllabus objective3.2.3.7Use of a single lens as a magnifying• Describe the use of a single lens as a magnifying glassSyllabus objective3.2.3.8Use of converging and diverging lenses• Describe the use of converging and diverging lenses to correct long-sightedness and short-sightednessSyllabus objective