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A-level 2025 AQA A-LEVEL PHYSICS Paper 3 Section B
PHYSICS
Medical Physics. Question Paper & Mark Scheme
(Merged) Tuesday 17 June 2025 [VERIFIED]
Paper 3
Section B Medical physics
Tuesday 17 June 2025 Morning Time allowed: The total time for
both sections of this paper is
Materials 2 hours. You are advised to
For this paper you must have:
a pencil and a ruler
spend approximately
a scientific calculator 50 minutes on this section.
a Data and Formulae Booklet
a protractor.
Instructions For Examiner’s Use
Use black ink or black ball-point pen. Question Mark
Fill in the boxes at the top of this page.
1
Answer all questions.
You must answer the questions in the spaces provided. Do not write 2
outside the box around each page or on blank pages. 3
If you need extra space for your answer(s), use the lined pages at the end of 4
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 TOTAL
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.
7 408/3BB
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IB/M/Jun25/G4006/E6
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
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IB/M/Jun25/7408/3BB
, 3
Do not write
outside the
Section B box
Answer all questions in this section.
0 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
0 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
Turn over ►
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IB/M/Jun25/7408/3BB
, 4
Do not write
outside the
box
The accommodation amplitude A, in dioptres, is given by
1 1
A=
d1 d2
where
d1 is the distance, in m, from the eye to its near point
d2 is the distance, in m, from the eye to its far point.
Figure 2 shows how the value of A varies with age for a typical person.
Figure 2
for more: tyrionpapers.com
IB/M/Jun25/7408/3BB
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level 2025 AQA A-LEVEL PHYSICS Paper 3 Section B
PHYSICS
Medical Physics. Question Paper & Mark Scheme
(Merged) Tuesday 17 June 2025 [VERIFIED]
Paper 3
Section B Medical physics
Tuesday 17 June 2025 Morning Time allowed: The total time for
both sections of this paper is
Materials 2 hours. You are advised to
For this paper you must have:
a pencil and a ruler
spend approximately
a scientific calculator 50 minutes on this section.
a Data and Formulae Booklet
a protractor.
Instructions For Examiner’s Use
Use black ink or black ball-point pen. Question Mark
Fill in the boxes at the top of this page.
1
Answer all questions.
You must answer the questions in the spaces provided. Do not write 2
outside the box around each page or on blank pages. 3
If you need extra space for your answer(s), use the lined pages at the end of 4
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 TOTAL
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.
7 408/3BB
for more : tyrionpapers.com
IB/M/Jun25/G4006/E6
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
for more: tyrionpapers.com
IB/M/Jun25/7408/3BB
, 3
Do not write
outside the
Section B box
Answer all questions in this section.
0 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
0 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
Turn over ►
for more: tyrionpapers.com
IB/M/Jun25/7408/3BB
, 4
Do not write
outside the
box
The accommodation amplitude A, in dioptres, is given by
1 1
A=
d1 d2
where
d1 is the distance, in m, from the eye to its near point
d2 is the distance, in m, from the eye to its far point.
Figure 2 shows how the value of A varies with age for a typical person.
Figure 2
for more: tyrionpapers.com
IB/M/Jun25/7408/3BB
