AQA A Level Physics 3bb Medical Physics 2025 Mark Scheme

Get the official AQA A-Level Physics Paper 3 Section B Medical Physics mark scheme from the June 2025 series (7408/3BB) — the final v1.0 examiner-approved document used by AQA to award all 35 Section B marks for candidates who chose Medical Physics as their Paper 3 optional topic. This free downloadable PDF gives you the exact accepted answers, alternative responses, mark allocations, and crucial examiner guidance for every Medical Physics question on the paper.

Use it to mark your June 2025 mock attempts to the standard examiners apply — including lens-defect calculations, dB-scale and threshold-of-hearing problems, ECG interpretation, ultrasound A-scan and B-scan reasoning, X-ray attenuation and CAT-scan questions, and radionuclide-imaging dose calculations. Pair it with the matching AQA 7408/3BB June 2025 question paper on markscheme.net for end-to-end exam practice. Updated for the 2025/2026 academic year, optimised for mobile and desktop, and instantly downloadable — your fastest route to top-grade A-Level Physics revision in the Medical Physics option.

This mark scheme is built for AQA A-Level Physics (7408) students who chose Medical Physics as their Paper 3 Section B option and want to mark June 2025 past-paper attempts to the exact standard examiners apply. It is especially valuable for aspiring medics, dentists, biomedical engineers, and physics applicants whose personal statements lean on Medical Physics; it is equally useful for Year 13 learners polishing exam technique, Year 12 students working ahead, retake candidates targeting an A or A*, and home-schooled students who need an examiner-aligned reference but lack a teacher to mark their work.

Physics teachers, private tutors, and Medical Physics-option leads can use this official AQA document to set timed Medical Physics-only mocks, run mark-scheme walkthroughs on imaging modalities, ECG analysis, and radiation dose, moderate marking across classes, and identify the lens-optics, decibel-scale, and attenuation-coefficient misconceptions that cost the most marks. Parents supporting revision at home will find the structured answers, accepted alternatives, and examiner notes make it simple to give targeted feedback — even without a physics background.