Available practice: 71 of 75 marks. Parts 5(a)(ii), 5(b)(i), 11(a) await marking support. Scores cover available parts only. Theory Paper 2: Section A is compulsory and Section B offers a choice of two questions. Four published mark-scheme discrepancies across the two variants are held from automatic marking.
(a)(i)A person can focus clearly on objects that are far away, but near objects appear blurred. Fig. 5.1 shows three rays from a point on a near object as they pass through the person’s eye. The refraction of the light as it enters the eye is ignored. State the name of the eye defect shown in Fig. 5.1.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[1 mark]
(a)(ii)A person can focus clearly on objects that are far away, but near objects appear blurred. Fig. 5.1 shows three rays from a point on a near object as they pass through the person’s eye. The refraction of the light as it enters the eye is ignored. Explain what causes the image of the near object to appear blurred.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[2 marks]
This part is shown as printed, but its marks conflict with the published mark scheme. It is not scored.
(b)(i)Fig. 5.1 shows the near-vision defect. On Fig. 5.2, draw the correcting lens in front of the eye and continue all three rays to the back of the eye.
[2 marks]
This part is shown as printed, but its marks conflict with the published mark scheme. It is not scored.
(b)(ii)A person can focus clearly on objects that are far away, but near objects appear blurred. Fig. 5.1 shows three rays from a point on a near object as they pass through the person’s eye. The refraction of the light as it enters the eye is ignored. A lens is used to correct the defect. State what type of lens is used.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[1 mark]
5054/22/M/J/16Cambridge O Level Physics 5054 · May/June 2016 · Paper 2 variant 2 · Question 5