# 9702 P1 Diffraction Topic Questions > CIE IAL 9702 P1: every Diffraction topic question from 9 papers (2025–2026), grouped by syllabus point. 9 questions, 9 marks, with direct links into the… - Canonical HTML: https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/ - Markdown mirror: https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/index.md --- CIE IAL · Physics · 9702 P1 · A Level Every 9702 P1 Diffraction topic question from the 2025–2027 syllabus, drawn from 9 papers (2025–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time. - 9702 P1 - 2 subtopics - 9 topic questions - 9 papers - 9 tagged marks - [Back to Diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/) - [All paper codes](https://www.examsci.com/topics/) Core finding **1 explain the meaning of the term diffraction is the most frequently assessed subtopic in Diffraction, with 6 topic questions and 6 marks across 6 papers.** 2 show an understanding of experiments that demonstrate… follows with 3 topic questions and 3 marks. The topic contains 2 subtopics, 9 topic questions and 9 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table. ## Topic question count and mark distribution Subtopics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a subtopic are counted for it, and percentages are each row's share of the tagged total in that chart. A part tagged to several subtopics is counted in each bar, so the bars are not a partition of the topic total. ### Questions by subtopic question items - [1 explain the meaning of the term diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/1-explain-the-meaning-of-the-term-diffraction/) (6 papers) — 6 · 66.7% - [2 show an understanding of experiments that demonstrate diffraction including the qualitative effect of the gap width relative to the wavelength of the wave; for example diffraction of water waves in a ripple tank](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/2-show-an-understanding-of-experiments-that-demonstrate-diffraction-including-the/) (3 papers) — 3 · 33.3% ### Marks by subtopic marks - [1 explain the meaning of the term diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/1-explain-the-meaning-of-the-term-diffraction/) (6 papers) — 6 · 66.7% - [2 show an understanding of experiments that demonstrate diffraction including the qualitative effect of the gap width relative to the wavelength of the wave; for example diffraction of water waves in a ripple tank](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/2-show-an-understanding-of-experiments-that-demonstrate-diffraction-including-the/) (3 papers) — 3 · 33.3% ## Subtopic comparison matrix Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list. | Subtopic | Topic questions | Papers | Marks | Years | | | --- | --- | --- | --- | --- | --- | | **[1 explain the meaning of the term diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/1-explain-the-meaning-of-the-term-diffraction/)** | 6 | 6 | 6 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/1-explain-the-meaning-of-the-term-diffraction/) | | **[2 show an understanding of experiments that demonstrate diffraction including the qualitative effect of the gap width relative to the wavelength of the wave; for example diffraction of water waves in a ripple tank](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/2-show-an-understanding-of-experiments-that-demonstrate-diffraction-including-the/)** | 3 | 3 | 3 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/2-show-an-understanding-of-experiments-that-demonstrate-diffraction-including-the/) | ## Browse every topic question - [1 explain the meaning of the term diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/1-explain-the-meaning-of-the-term-diffraction/) — 6 question items · 6 papers — 6 marks · 2025–2026 - [2 show an understanding of experiments that demonstrate diffraction including the qualitative effect of the gap width relative to the wavelength of the wave; for example diffraction of water waves in a ripple tank](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/2-show-an-understanding-of-experiments-that-demonstrate-diffraction-including-the/) — 3 question items · 3 papers — 3 marks · 2025–2026 ## Other topics in 9702 P1 - [Atoms, nuclei and radiation 27 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) - [Density and pressure 26 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/) - [Doppler effect for sound waves 11 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/doppler-effect-for-sound-waves/) - [Elastic and plastic behaviour 22 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/elastic-and-plastic-behaviour/) - [Electric current 13 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/) - [Electromagnetic spectrum 9 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/) - [Energy conservation 25 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/) - [Equations of motion 43 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) - [Equilibrium of forces 17 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/) - [Errors and uncertainties 16 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/) ## Topic question rules and edge cases **How many subtopics does Diffraction contain?** This page lists 2 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions. **How are the subtopic question and mark totals calculated?** A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them. **Why do some subtopics have no numbered prefix?** Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically. **Is the LaTeX rendered without JavaScript?** Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/