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6 marksPhysics of the Ear and Eye

CAPE Physics Unit 1 · 2002 · Paper 2 · Question 6(d)(i)

An overhead projector lens has a focal length of 35 cm. The image of a transparency is formed 2 m from the lens, with a total path length from lens to screen of 2.0 m.

How far above the transparency must the lens be held in order for the image to be formed on the screen?

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Other parts of this question

  1. 6(a)Define the term 'principal focus of a lens'.[2 marks]
  2. 6(b)Draw a ray diagram to illustrate the formation of the image of an extended object by a convex lens when the object is at a distance from the lens, greater than…[2 marks]
  3. 6(c)(i)Draw a ray diagram to show how an image is formed in a diverging lens.[4 marks]
  4. 6(c)(ii)Compare the images formed in (b) and (c)(i).[4 marks]
  5. 6(d)(ii)What is the magnifying power of the lens and how does this affect image formed?[6 marks]
  6. 6(e)Explain how, by plotting a suitable graph, the focal length of the lens could be determined from the data collected. Include a sketch of the graph you would…[6 marks]

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