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Thin lenses
Explain how thin converging and diverging lenses affect a parallel beam of light.
8
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80
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56
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90 min
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CambridgeIGCSEPhysicsSubject content
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Thin lenses outcomes8 objectives
- Explain how thin converging and diverging lenses affect a parallel beam of light.
- Define and apply the concepts of focal length, principal axis, and principal focus (focal point).
- Create and interpret ray diagrams that illustrate how a converging lens forms a real image.
- Characterize an image using terms such as enlarged, same size, diminished, upright, inverted, real, and virtual.
- Understand that a virtual image is created when diverging rays are traced backward and cannot be projected onto a screen.
- Create and interpret ray diagrams that show how a converging lens forms a virtual image.
- Explain how a single lens functions as a magnifying glass.
- Explain how converging and diverging lenses are used to correct long-sightedness and short-sightedness.
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