- Problems in the archive
- 112
- New in the last 24 hours
- —
100 catalog entries (including 5 imported) + 12 quick-practice problems
Addition dates aren't recorded yet.
Waves
Good questions lead to great discoveries. Find your next one.
The olympiad library
40 IPhO · 35 APhO · 25 EuPhO. Complete statements and diagrams imported across six topics, from 2004 to 2025. Solution completeness and English translation progress are tracked separately.
100 statements imported · solution review required
Topic coverage & source audit
Each problem counts under one editorial primary topic. Concept tags remain searchable. Actual coverage is shown against the proposed targets, not disguised as a completed quota.
| Primary topic | IPhO | APhO | EuPhO | Actual / target |
|---|---|---|---|---|
| Mechanics | 9 | 7 | 4 | 20 / 20 |
| Electromagnetism | 9 | 5 | 6 | 20 / 20 |
| Waves | 5 | 7 | 3 | 15 / 15 |
| Thermodynamics | 7 | 3 | 5 | 15 / 15 |
| Optics | 4 | 6 | 5 | 15 / 15 |
| Modern physics | 6 | 7 | 2 | 15 / 15 |
Original PDF layouts are preserved, including shared year papers where needed. Every imported problem includes selectable source text and locally stored figures. Russian mirror imports are labeled; pho.rs is a source host, not a fourth competition. The original five pilot problems also retain their structured subpart guides.
Full theory problems
- APhO 2025 · T2Imported
Waves and phase transitions in spin systems
WavesSpin wavesDispersionPhase transitionsRussian source · English translation pending · local text & diagrams · Unrated
- EuPhO 2025 · T2Imported
Floating table
WavesOscillationsStable equilibriumRigid-body dynamicsEnglish source · local PDFs & diagrams · Unrated
- IPhO 2025 · T3Imported
Let’s toast!
ThermodynamicsSurface tensionBubble dynamicsAcousticsEnglish source · local PDFs & diagrams · Unrated
- EuPhO 2022 · T1Imported
Floating cylinder
WavesOscillationsBuoyancyFluid flowEnglish source · local PDFs & diagrams · Unrated
- APhO 2021 · T1Imported
Water hammer
WavesPressure wavesWave propagationFluid flowRussian source · English translation pending · local text & diagrams · Unrated
- APhO 2019 · T1Imported
Reflectometry in single-electron circuits
WavesTransmission linesWave reflectionSingle-electron transistorsRussian source · English translation pending · local text & diagrams · Unrated
- IPhO 2019 · T1Imported
Zero-length spring and slinky
WavesElasticityOscillationsWave propagationEnglish source · local PDFs & diagrams · Unrated
- IPhO 2019 · T3Imported
Thermoacoustic engine
WavesAcousticsStanding wavesHeat enginesEnglish source · local PDFs & diagrams · Unrated
- IPhO 2018 · T1Imported
LIGO–GW150914
WavesGravitational wavesBinary systemsOrbital dynamicsEnglish source · local PDFs & diagrams · Unrated
- EuPhO 2017 · T1Imported
Oscillating rope
WavesNormal modesStanding wavesWave propagationEnglish source · local PDFs & diagrams · Unrated
The import pilot
IPhO 2011, 2015 & 2025. Original statements and solutions, with a structured subpart index. Five full problems, not a collection of isolated answer fragments.
Source-fidelity pilot · review pending
Official-source theory problems
58 scored subparts across the batch. Grouped requests such as 2011 task 1.2 retain their nested questions; subparts are not counted as separate archive problems.
Portable JSON includes provenance, attribution, native reading notes, subpart mappings, local PDF/image paths, review status, and SHA-256 checksums. Files stay in the project; no database or background importer is connected.