Revision: Lenses

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04 Lenses - Revision Quiz

Test your understanding of Lenses here:

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1) 2017 S4 EOY P1 Q13

A converging lens has a focal length of 20.0 cm. If an object is placed at 10.0 cm away from the optical centre of the lens, what are the characteristics of the image formed?

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2) 2023 S3 EOY P1 Q09

Which of the following does not affect the focal length of a convex lens?

(i) Refractive index of the lens material
(ii) Object distance
(iii) Thickness of the lens

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3) The diagram shows a lens forming a blurred image of an object on a screen.

How can a sharp image be obtained on the screen?

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4) 2024 S4 EOY P1 Q11

The diagram shows a thin converging lens with a focal length f. The dots on the principal axis are marked to scale.

Where must an object be placed to produce an inverted real image as shown?

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5) Ray X travels in the direction shown and passes through a lens.

Which ray correctly shows ray X emerging from the lens?

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