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3 marksPhysics of the Ear and Eye

CAPE Physics Unit 1 · 2006 · Paper 2 · Question 2(a)

An experimental setup is used to measure the focal length, f, and position, d, of a converging lens inside a cardboard tube. The distance from end A to the screen is x. Figure 1 illustrates this setup.

Briefly explain how you would take readings in order to determine the magnification of the image for various values of x.

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Other parts of this question

  1. 2(b)Figure 2 is a plot of m versus x.[1 mark]
  2. 2(b)(i)Show that the gradient of the graph is 1/f.[1 mark]
  3. 2(b)(ii)Show that when m = 0, x + d = f.[1 mark]
  4. 2(c)(i)Draw the best straight line through the points.[1 mark]
  5. 2(c)(ii)a)Determine the gradient of the graph.[2 marks]
  6. 2(c)(ii)b)Determine the focal length, f, of the lens.[1 mark]
  7. 2(c)(ii)c)Determine the position d of the lens inside the tube.[1 mark]

More practice: the rest of this paper · more Physics of the Ear and Eye questions · all CAPE Physics Unit 1 past papers