AQA
A-level
PHYSICS
7408/3BA
Paper 3 Section B Astrophysics
Version: 1.0 Final
*JUN2374083ba01*
IB/M/Jun23/E9 7408/3BA
For Examiner’s
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Question Mark
1
2
3
4
5
TOTAL
Thursday 15 June 2023 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 Astrophysics
Time allowed: The total time for
both sections of this paper is
2 hours. You are advised to
spend approximately
50 minutes on this section.
2
*02*
IB/M/Jun23/7408/3BA
Do not write
outside the Section B box
Answer all questions in this section.
0 1 . 1 Draw a labelled diagram to define the parsec (pc).
[1 mark]
Table 1 shows data for two stars: Rigel and the Sun.
Table 1
Star Surface temperature / K Absolute magnitude Mass / kg
Rigel 12 000 −7.84 3.6 × 1031
Sun 5700 4.83 2.0 × 1030
0 1 . 2 State the spectral class of Rigel.
[1 mark]
3
*03*
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IB/M/Jun23/7408/3BA
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outside the
0 1 box . 3 The apparent magnitude of Rigel is 0.11
Calculate, in pc, the distance from Rigel to the Earth.
[2 marks]
distance = pc
Question 1 continues on the next page
4
*04*
IB/M/Jun23/7408/3BA
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outside the
0 1 box . 4 Figure 1 shows a Hertzsprung–Russell (HR) diagram.
Figure 1
Draw a line on Figure 1 to show the evolution of the Sun from formation
to white dwarf.
[1 mark]
0 1 . 5 One stage in the evolution of Rigel includes the emission of a gamma ray burst.
Outline the circumstances during which a gamma ray burst will be emitted by Rigel.
[2 marks]
7
5
*05*
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outside the
Turn over for the next question box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
6
*06*
IB/M/Jun23/7408/3BA
Do not write
outside the
0 2 box . 1 State what is meant by normal adjustment when applied to an astronomical
refracting telescope.
[1 mark]
0 2 . 2 Which combination of lenses gives the largest angular magnification when used as
an astronomical telescope in normal adjustment?
Tick () one box.
[1 mark]
Objective lens Eyepiece lens
Focal length / cm Type Focal length / cm Type
5 diverging 100 converging
5 converging 100 converging
100 diverging 5 converging
100 converging 5 converging
V1031 and WASP-82 are two stars in the constellation Orion.
V1031 appears 40 times brighter than WASP-82 when viewed from Earth.
The apparent magnitude of V1031 is 6.0
0 2 . 3 Calculate the apparent magnitude of WASP- [Show Less]