Edexcel IAL · Physics · WPH12 · Waves and Particle Nature of Light
Topic Questions: 40 be able to use the relationship between phase difference and path difference — WPH12 Waves and Particle Nature of Light
18 WPH12 Waves and Particle Nature of Light topic questions are tagged to this syllabus point across 16 papers (2019–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.
Core finding
This Waves and Particle Nature of Light syllabus point appears in 16 WPH12 papers across 2019–2026, contributing 18 topic questions and 45 marks. The most recent appearance is WPH12/01 January 2026. That equals 3.8% of the 468 topic questions and 4.0% of the 1,138 marks tagged to Waves and Particle Nature of Light. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history.
Topic questions by session
Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use Go to Practice Hub to answer that exact question in the Interactive Practice Hub.
| Paper | Question | Type | Parts | Marks | Difficulty | Practice |
|---|---|---|---|---|---|---|
| WPH12/01January 2026 · Edexcel IAL | Q5 Phase and Path Difference - Edexcel IAL Physics Jan 2026 Q5 |
MCQ | MCQ · 1 part | 1 | Easy | Go to Practice Hub |
| WPH12/01January 2026 · Edexcel IAL | Q17 Diffraction Grating Maxima - Edexcel IAL Physics Jan 2026 Q17 |
FRQ | 1 of 2 parts ((b)) | 3 of 7 on the paper |
Hard | Go to Practice Hub |
| WPH12/02January 2026 · Edexcel IAL | Q19 Diffraction Grating and Wave Interference - Edexcel IAL Physics Jan 2026 Q19 |
FRQ | 1 of 3 parts ((b)) | 3 of 9 on the paper |
Medium | Go to Practice Hub |
| WPH12/01October 2025 · Edexcel IAL | Q5 Phase Difference in Radians - Edexcel IAL Physics Oct 2025 Q5 |
MCQ | MCQ · 1 part | 1 | Easy | Go to Practice Hub |
| WPH12/02October 2025 · Edexcel IAL | Q7 Phase Difference in Path Difference - Edexcel IAL Physics Oct 2025 Q7 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01June 2025 · Edexcel IAL | Q7 Phase Difference and Interference - Edexcel IAL Physics May 2025 Q7 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01October 2024 · Edexcel IAL | Q13 Hologram Interference - Edexcel IAL Physics Oct 2024 Q13 |
FRQ | 1 of 2 parts ((b)) | 3 of 4 on the paper |
Easy | Go to Practice Hub |
| WPH12/01January 2024 · Edexcel IAL | Q17 Harbour Wave Diffraction and Interference - Edexcel IAL Physics Jan 2024 Q17 |
FRQ | 1 of 2 parts ((b)) | 6 of 8 on the paper |
Medium | Go to Practice Hub |
| WPH12/01October 2023 · Edexcel IAL | Q16 Solar Cell Thin Coating and Efficiency - Edexcel IAL Physics Oct 2023 Q16 |
FRQ | 2 of 3 parts ((a), (b)) | 7 of 11 on the paper |
Hard | Go to Practice Hub |
| WPH12/01June 2023 · Edexcel IAL | Q6 Path Difference and Phase Difference - Edexcel IAL Physics May 2023 Q6 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01January 2023 · Edexcel IAL | Q15 Interference and Coherence - Edexcel IAL Physics Jan 2023 Q15 |
FRQ | 1 of 2 parts ((a)) | 6 of 8 on the paper |
Medium | Go to Practice Hub |
| WPH12/01June 2022 · Edexcel IAL | Q14 Earthquake Waves: Wave Speed, Coherence and Interference - Edexcel IAL Physics June 2022 Q14 |
FRQ | 1 of 4 parts ((b)(ii)) | 3 of 11 on the paper |
Easy | Go to Practice Hub |
| WPH12/01January 2022 · Edexcel IAL | Q9 Path Difference and Phase Difference - Edexcel IAL Physics Jan 2022 Q9 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01October 2021 · Edexcel IAL | Q7 Microwave Interference in Oven - Edexcel IAL Physics Oct 2021 Q7 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01October 2020 · Edexcel IAL | Q2 Phase Difference and Path Difference - Edexcel IAL Physics Oct 2020 Q2 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01October 2019 · Edexcel IAL | Q9 Phase and Path Difference of Waves - Edexcel IAL Physics Oct 2019 Q9 |
MCQ | MCQ · 1 part | 1 | Medium | Go to Practice Hub |
| WPH12/01June 2019 · Edexcel IAL | Q17 Two-Source Interference of Sound Waves - Edexcel IAL Physics May 2019 Q17 |
FRQ | 1 of 4 parts ((b)(i)) | 5 of 12 on the paper |
Medium | Go to Practice Hub |
Related topic questions in Waves and Particle Nature of Light
Topic question rules and edge cases
- How many topic questions cover this syllabus point?
- 17 question stems cover this subtopic across 16 papers, but only 18 tagged parts and 45 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page.
- Which papers include this subtopic?
- The table lists every matching session from 2019–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available.
- Why can one question appear under several subtopics?
- The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement.
- Can I practise these questions with AI marking?
- Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript.