AQA A-Level Physics Paper 3 (3BA), June 2025
Every question from AQA A-Level Physics Paper 3 (3BA), June 2025 (7408): 5 questions, 35 marks, each with its mark scheme and topic.
- Question 1 5 marks
Sketch a black-body radiation curve using Wien's displacement law, suggest the absolute magnitude of a Sun-like star, and describe a difficulty in detecting Earth-like exoplanets.
Optional topics · 3.9 Astrophysics (A-level only)
- Question 2 10 marks
Draw a ray diagram for an astronomical telescope, compare a refracting and reflecting telescope observing Mars, and explain advantages of a CCD over the human eye.
Optional topics · 3.9 Astrophysics (A-level only)
- Question 3 5 marks
Calculate the recessional velocity of galaxy M87 using Hubble's law, suggest observational evidence for an active supermassive black hole at its centre, and identify evidence for dark energy.
Optional topics · 3.9 Astrophysics (A-level only)
- Question 4 10 marks
Analyze data and a light curve for a binary star system to confirm distance consistency, identify spectral absorption lines, compare temperatures, explain eclipse dips, and calculate the angular velocity.
Optional topics · Physics · 3.9 Astrophysics (A-level only) · 3.6 Further mechanics and thermal physics (A-level only)
- Question 5 5 marks
Discuss whether the conclusions of two student groups regarding Betelgeuse's revised intensity, distance, and radius could be correct, assuming constant temperature.
Optional topics · 3.9 Astrophysics (A-level only)