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*JUN25 74083 BB01*
IB/M/Jun25/G4006/E6 7408/3BB
For Examiner’s Use Question Mark 1 2 3 4 TOTAL
Tuesday 17 June 2025 Morning
Materials
For this paper you must have:
• a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor.
Instructions • Use black ink or black ball-point pen.• Fill in the boxes at the top of this page.• Answer all questions.• You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.• If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s).• Do all rough work in this book. Cross through any work you do not want to be marked.• Show all your working.
Information • The marks for questions are shown in brackets.• The maximum mark for this paper is 35.• You are expected to use a scientific calculator where appropriate.• A Data and Formulae Booklet is provided as a loose insert.Please write clearly in block capitals.Centre number
Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.A-level
PHYSICS
Paper 3 Section B Medical physics
Time allowed: The total time for
both sections of this paper is
- hours. You are advised to
spend approximately 50 minutes on this section. 1 / 3
2
*02* IB/M/Jun25/7408/3BB
Do not write outside the box
There are no questions printed on this page
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
- / 3
3
*03* Turn over ►
IB/M/Jun25/7408/3 BB
Do not write outside the box Section B
Answer all questions in this section.
- 1
. 1 Figure 1 shows a simplified diagram of an eye that has no sight defects.The eye is viewing a distant point object.
Complete, on Figure 1, the paths of the two rays to the back of the eye.[2 marks]
Figure 1
- 1
. 2 Accommodation is the ability of the eye to change its optical power.
Which part of the eye enables accommodation?
Tick () one box.[1 mark]
cornea
iris
lens
Question 1 continues on the next page
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