Every experimental problem
The experimental problems of six international physics olympiads, by year. Anything marked Run opens as working apparatus in the browser — it shows what the instruments show and computes nothing for you.
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IPhO — International Physics Olympiad
International · 27 years · 44 experimental problems
IPhO 2026 Bucaramanga, Colombia
E1 Ideal Gas, Vapor Pressure, and Heat Conduction In preparation
IPhO 2025 Paris, France
E1 Earth's magnetic field measurement In preparation E2 Sand craters and dunes In preparation
IPhO 2024 Isfahan, Iran
E1 Heat Conduction in a Copper Rod In preparation E2 Diffraction from Phase Steps In preparation
IPhO 2023 Tokyo, Japan
E1 Mass Measurement In preparation E2 Birefringence In preparation
IPhO 2022 Switzerland, online
E1 Planet In preparation E2 Cylindrical Diode In preparation
IPhO 2021 Vilnius, Lithuania, online
E1 Non-ideal Capacitors In preparation E2 LEDs In preparation
IPhO 2020 IdPhO · organised by MIPT, online
E1 Crystallography In preparation
IPhO 2019 Tel Aviv, Israel
E1 Optical Measurements In preparation E2 Wiedemann–Franz Law In preparation
IPhO 2018 Lisbon, Portugal
E1 Paper Transistor In preparation E2 Viscoelasticity of a Polymer Thread In preparation
IPhO 2017 Yogyakarta, Indonesia
IPhO 2016 Zurich, Switzerland
E1 Electrical Conductivity in 2D In preparation E2 Jumping Beads In preparation
IPhO 2015 Mumbai, India
E1 Diffraction due to Helical Structure In preparation E2 Diffraction due to Surface Tension In preparation
IPhO 2014 Astana, Kazakhstan
E1 To see invisible! In preparation
IPhO 2013 Copenhagen, Denmark
E1 Speed of Light In preparation E2 Solar Cells In preparation
IPhO 2012 Tartu and Tallinn, Estonia
E1 The Magnetic Permeability of Water In preparation E2 Nonlinear Black Box In preparation
IPhO 2011 Bangkok, Thailand
E1 Blackbox: Capacitive Displacement Sensor In preparation E2 Mechanical Blackbox: A Cylinder with a Ball Inside In preparation
IPhO 2010 Zagreb, Croatia
E1 Elasticity of Sheets In preparation E2 Forces between Magnets In preparation
IPhO 2009 Mérida, Mexico
E1 Wavelength of a Diode Laser In preparation E2 Birefringence of Mica In preparation
IPhO 2008 Hanoi, Vietnam
E1 Differential Thermometric Method In preparation
IPhO 2007 Isfahan, Iran
E1 Band Gap of Semiconductor Thin Films In preparation
IPhO 2006 Singapore
E1 Interference, Reflection and Diffraction In preparation
IPhO 2005 Salamanca, Spain
E1 Planck's Constant in an Incandescent Lamp In preparation
IPhO 2004 Pohang, South Korea
E1 Mechanical "Black Box" In preparation
IPhO 2003 Taipei, Taiwan
E1 Optical Properties of Laser Diode In preparation
IPhO 2002 Bali, Indonesia
E1 Physical Constants with Electrolysis In preparation E2 Optical Black Box In preparation
IPhO 2001 Antalya, Turkey
E1 Rotating Liquid In preparation
IPhO 2000 Leicester, United Kingdom
E1 CD-ROM Spectrometer In preparation E2 The Magnetic Puck In preparation
APhO — Asian Physics Olympiad
Asia · 26 years · 42 experimental problems
APhO 2026 Busan, South Korea
E1 Water Clock Experiment In preparation E2 Estimation of Unknown Resistance In preparation
APhO 2025 Dhahran, Saudi Arabia
E1 Physics of Induction Cooking In preparation
APhO 2024 Kampar, Malaysia
E1 Gyroscope In preparation
APhO 2023 Ulaanbaatar, Mongolia
APhO 2022 Dehradun, India, online
E1 Magnetic Black Box In preparation E2 Acoustic Black Box In preparation
APhO 2021 Taipei, Taiwan, online
E1 Elasticity of Cantilever In preparation E2 Exploring the Spatial Structure of the Sample with Optical Methods In preparation
APhO 2019 Adelaide, Australia
E1 Static Response of a Magnetically Active Fluid In preparation E2 Wave Pulses in a Magnetically Active Fluid In preparation
APhO 2018 Hanoi, Vietnam
E1 Giant Magnetoresistance (GMR) In preparation
APhO 2017 Yakutsk, Russia
E1 Photonic Crystal In preparation
APhO 2016 Hong Kong
E1 Reflected Optical Diffraction Patterns from One-Dimensional Structures In preparation E2 Reflection Phase Shift of Metal In preparation
APhO 2015 Hangzhou, China
E1 The Piezoelectric Effect and Its Applications In preparation
APhO 2014 Singapore
E1 Speed of Ultrasonic Sound in Solution In preparation
APhO 2013 Bogor, Indonesia
E1 Wind Power and Its Metrologies In preparation
APhO 2012 New Delhi, India
E1 Friction In preparation E2 Electromagnetic Induction In preparation
APhO 2011 Tel Aviv, Israel
E1 Levitation of Conductors in an Oscillating Magnetic Field In preparation E2 An Optical "Black Box" In preparation
APhO 2010 Taipei, Taiwan
E1 Magnetic Force Probe In preparation E2 Understanding Semiconductor Lasers In preparation
APhO 2009 Bangkok, Thailand
E1 The Earth's Horizontal Magnetic Field In preparation E2 Oscillation of a Water-Filled Vessel In preparation
APhO 2008 Ulaanbaatar, Mongolia
E1 The Physics of Sound Waves In preparation
APhO 2007 Shanghai, China
E1 Interference Method for the Thermal Expansion and Refractive Index of Glass In preparation E2 Measurement of Liquid Electric Conductivity In preparation
APhO 2006 Almaty, Kazakhstan
E1 Specific Heat of Aluminium and Latent Heat of Evaporation In preparation
APhO 2005 Pekanbaru, Indonesia
E1 Determination of Shapes by Reflection In preparation E2 Magnetic Braking on an Inclined Plane In preparation
APhO 2004 Hanoi, Vietnam
E1 Hall Effect and Magnetoresistivity Effect In preparation E2 Black Box In preparation
APhO 2003 Bangkok, Thailand
E1 Determination of Capacitance In preparation E2 Cylindrical Bore In preparation
APhO 2002 Singapore
E1 Measurement of Reflectance and Determination of Refractive Index In preparation E2 Frequency of Vibration of a Tuning Fork In preparation
APhO 2001 Taipei, Taiwan
E1 Basic Characteristics of Solar Cells In preparation
APhO 2000 Karawaci, Indonesia
E1 Determination of the Density of Oil In preparation E2 Determination of the Stefan–Boltzmann Constant In preparation
EuPhO — European Physics Olympiad
Europe · 10 years · 14 experimental problems
EuPhO 2026 Gothenburg, Sweden
E1 Acoustic Levitation In preparation
EuPhO 2025 Sofia, Bulgaria
E1 Deep Learning In preparation E2 Hidden Pattern In preparation
EuPhO 2024 Kutaisi, Georgia
E1 Physics of Piezoelectricity In preparation
EuPhO 2023 Hannover, Germany
E1 Magnetic Pendulum In preparation E2 Optical Black-Box In preparation
EuPhO 2022 Ljubljana, Slovenia
E1 Physics of Illumination In preparation
EuPhO 2021 Online, hosted by Estonia
E1 Hidden Wire In preparation E2 Hot Cylinder In preparation
EuPhO 2020 Satu Mare, Romania, online
E1 Hidden Charge In preparation E2 Black Box In preparation
EuPhO 2019 Riga, Latvia
E1 Propagation of Radio Waves In preparation
EuPhO 2018 Dolgoprudny, Russia
E1 Porous Membrane In preparation
EuPhO 2017 Tartu, Estonia
E1 Light-Emitting Diode In preparation
NBPhO — Nordic-Baltic Physics Olympiad
Nordic & Baltic · 13 years · 14 experimental problems
NBPhO 2025 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2023 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2018 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2017 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2016 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2012 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2011 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2010 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2009 Tallinn, Estonia
E1 Black Box In preparation
NBPhO 2006 Tallinn, Estonia
E1 Electric Experiment In preparation E2 Optics Experiment In preparation
NBPhO 2005 Tallinn, Estonia
E1 Mechanical "Black Box" In preparation
NBPhO 2004 Tallinn, Estonia
E1 Black Box Experiment In preparation
NBPhO 2003 Tallinn, Estonia
E1 Magnetic Experiment In preparation
ISPhO — International Scientific Physics Olympiad
International · 4 years · 6 experimental problems
ISPhO 2026 Online
ISPhO 2025 Khanty-Mansiysk, Russia · MIPT
ISPhO 2024 Khanty-Mansiysk, Russia · MIPT
ISPhO 2023 Khanty-Mansiysk, Russia · MIPT
RMPh — Romanian Master of Physics
Invitational · Romania · 8 years · 11 experimental problems
RMPh 2024 Bucharest, Romania
E1 Ferromagnetic phase transition: The Ising model In preparation
RMPh 2023 Bucharest, Romania
E1 Experimental studies in rotating reference frames In preparation
RMPh 2021 Online
E1 Measurement of D⁰ lifetime In preparation
RMPh 2018 Bucharest, Romania
E1 Polycrystals and monomolecular layers In preparation
RMPh 2017 Bucharest, Romania
E1 Polarization and Photodiodes In preparation
RMPh 2014 Bucharest, Romania
E1 Determination of data using a chronometer In preparation E2 Eletrical Black Box In preparation
RMPh 2013 Bucharest, Romania
E1 Porosity In preparation E2 Black Box In preparation
RMPh 2012 Bucharest, Romania
E1 Maxwell-Boltzmann distributions In preparation E2 Optics with lasers In preparation
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