O-LevelPhysicsLight5054/11 · May/June 2019 · Q251 Mark
A parallel beam of light is incident on a thin diverging lens. The focal length of the lens is FL, as shown in the diagram. Which ray diagram shows the beam after it has passed through the lens?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ADiagram showing parallel rays converging after passing through a lens, passing through a focal point F on the right.
BDiagram showing parallel rays diverging after passing through a lens, appearing to originate from a focal point F on the right.
CDiagram showing parallel rays diverging after passing through a lens, appearing to originate from a focal point F on the left.
DDiagram showing parallel rays diverging after passing through a lens, where some rays are extrapolated to meet at a focal point F on the right, which is incorrect for a diverging lens with F on the left.
✓ Correct answer
C: Diagram showing parallel rays diverging after passing through a lens, appearing to originate from a focal point F on the left.
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