Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
PHYSICS
Paper 2
Wednesday 21 May 2025 Afternoon Time allowed: 1 hour 30 minutes
You are advised to spend about
Materials
For this paper you must have:
35 minutes on Section C
• a pencil and a ruler
For Examiner’s Use
• a scientific calculator
• a Data and Formulae Booklet Question Mark
• a protractor. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• Answer all questions. 5–34
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages. TOTAL
• 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 70.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN257407201*
7407/2
for more: tyrionpapers.com
IB/M/Jun25/G4002/V8
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about a method to investigate interference by a diffraction grating
(required practical activity 2).
Light from a laser is shone onto the diffraction grating at normal incidence.
0 1 . 1 State one safety precaution when using a laser in a school laboratory.
[1 mark]
A piece of squared paper is positioned parallel to the diffraction grating.
Figure 1 shows the pattern of four bright spots A, B, C and D that are seen on
the paper.
Figure 1
A student determines the distance x from the left-hand edge of the paper to the
centre of each spot.
Table 1 shows these data, including the uncertainty in each value of x.
Table 1
Spot x / mm
A 60 ± 5
B 321 ± 5
C 553 ± 5
D 785 ± 5
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IB/M/Jun25/7407/2
, 3
Do not write
outside the
0 1 . 2 C is the central maximum. box
Determine ∆x, the distance between C and the spot at the second-order maximum.
Go on to determine the percentage uncertainty in ∆x.
[2 marks]
∆x = mm
percentage uncertainty = %
0 1 . 3 When the readings in Table 1 were taken, the distance between the grating and the
paper was 1.20 m.
The grating has 300 lines per mm.
Determine an accurate value for the wavelength of the laser light.
[3 marks]
wavelength = m
Question 1 continues on the next page
Turn over ►
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IB/M/Jun25/7407/2
, 4
Do not write
outside the
0 1 . 4 The student changes the distance between the grating and the paper so that box
B and D are at the edges of the paper as shown in Figure 2.
The paper and diffraction grating remain parallel.
Figure 2
Determine the new distance between the grating and the paper.
[2 marks]
distance = m 8
*04* for more: tyrionpapers.com
IB/M/Jun25/7407/2
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
PHYSICS
Paper 2
Wednesday 21 May 2025 Afternoon Time allowed: 1 hour 30 minutes
You are advised to spend about
Materials
For this paper you must have:
35 minutes on Section C
• a pencil and a ruler
For Examiner’s Use
• a scientific calculator
• a Data and Formulae Booklet Question Mark
• a protractor. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• Answer all questions. 5–34
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages. TOTAL
• 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 70.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN257407201*
7407/2
for more: tyrionpapers.com
IB/M/Jun25/G4002/V8
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about a method to investigate interference by a diffraction grating
(required practical activity 2).
Light from a laser is shone onto the diffraction grating at normal incidence.
0 1 . 1 State one safety precaution when using a laser in a school laboratory.
[1 mark]
A piece of squared paper is positioned parallel to the diffraction grating.
Figure 1 shows the pattern of four bright spots A, B, C and D that are seen on
the paper.
Figure 1
A student determines the distance x from the left-hand edge of the paper to the
centre of each spot.
Table 1 shows these data, including the uncertainty in each value of x.
Table 1
Spot x / mm
A 60 ± 5
B 321 ± 5
C 553 ± 5
D 785 ± 5
*02* for more: tyrionpapers.com
IB/M/Jun25/7407/2
, 3
Do not write
outside the
0 1 . 2 C is the central maximum. box
Determine ∆x, the distance between C and the spot at the second-order maximum.
Go on to determine the percentage uncertainty in ∆x.
[2 marks]
∆x = mm
percentage uncertainty = %
0 1 . 3 When the readings in Table 1 were taken, the distance between the grating and the
paper was 1.20 m.
The grating has 300 lines per mm.
Determine an accurate value for the wavelength of the laser light.
[3 marks]
wavelength = m
Question 1 continues on the next page
Turn over ►
*03* for more: tyrionpapers.com
IB/M/Jun25/7407/2
, 4
Do not write
outside the
0 1 . 4 The student changes the distance between the grating and the paper so that box
B and D are at the edges of the paper as shown in Figure 2.
The paper and diffraction grating remain parallel.
Figure 2
Determine the new distance between the grating and the paper.
[2 marks]
distance = m 8
*04* for more: tyrionpapers.com
IB/M/Jun25/7407/2
