Quelpr
5 marksPhysics of the Ear and Eye

CAPE Physics Unit 1 · 2009 · Paper 2 · Question 5(b)(i)

A student can only see objects clearly if they are more than 80 cm from her eyes. The normal near point is 25 cm from the eye.

Name the student's eye defect.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(i)Explain what is meant by 'Accommodation' as it relates to the human eye.[1 mark]
  2. 5(a)(ii)Explain what is meant by 'Depth of focus' as it relates to the human eye.[1 mark]
  3. 5(b)(ii)Copy Figure 3 onto your answer booklet. On the copied diagram, draw a ray diagram to illustrate the paths of two light rays from a point object at the normal…[5 marks]
  4. 5(b)(iii)Draw a second ray diagram to show how a lens may be used to correct the defect for an object set at 25 cm from the eye.[5 marks]
  5. 5(c)(i)Calculate the position of her near point at age 45.[4 marks]
  6. 5(c)(ii)Calculate the position of her near point at age 55.[2 marks]
  7. 5(c)(iii)Calculate the power of the lens of the reading glasses now required so that she can again read at 25 cm.[2 marks]

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