TL;DR
These 50 physics research topics for high school students cover mechanics, electricity, optics, waves, thermodynamics, electromagnetism, and quantum physics. Topics include electrical resistance, solar cells, pendulums, magnetic fields, radiation shielding, friction, standing waves, Planck’s constant, projectile motion, and heat transfer. You can approach them through experiments, measurements, data analysis, or computer-based modeling, depending on the topic and equipment available. If you want structured mentorship while developing a research project, explore the Horizon Academic Research Program.
Physics research gives you a practical way to investigate a concept you have encountered in class. You can choose a physical system, identify the variables, collect measurements, and compare your findings with an established model. The topics below cover several areas of physics and range from school-lab investigations to projects that need more specialized equipment.
You can also explore online physics programs for high school students for more structured ways to study physics.
Which physics topics are easiest to investigate with school or home equipment?
Many physics projects can use equipment you may already have access to. Pendulums, inclined planes, projectiles, insulation, water waves, friction, and basic optics can all produce useful measurements with simple setups.
Phone cameras, timers, thermometers, light sensors, multimeters, and basic electrical components can also support data collection. The final method depends on the question, the precision you need, and the equipment available to you.
How do you choose a physics topic that fits your interests?
Start with the part of physics you enjoy most. Mechanics covers motion, forces, energy, momentum, and rotation. Optics focuses on light, while electricity and electromagnetism let you work with circuits, resistance, magnetic fields, and coils.
Waves, thermodynamics, and quantum physics open up other directions. Looking at the equipment you can access can help narrow the choice further.
What makes a physics research topic workable for a high school project?
A workable topic gives you something specific to observe, measure, compare, or model. It should be possible to define the variables, repeat the measurements, record uncertainty, and explain the results using relevant physics.
A broad area such as mechanics needs to become a focused investigation. For example, projectile motion can be narrowed to the relationship between launch angle and horizontal range under controlled conditions.
You can also read how to choose a research topic as a high school student before settling on your topic.
Which physics topics have clear links to engineering and technology?
Several of these topics connect directly to technologies used in engineering and everyday systems. Solar cells connect to photovoltaic technology, electromagnets to motors and electrical devices, optics to lenses and fiber optics, and insulation to energy-efficient buildings.
Other topics connect to aerospace, robotics, acoustics, electronics, navigation, and energy systems. You can also browse STEM research topics for high school students for related areas.
What equipment do you need for a physics research project?
The equipment depends on the topic. Some projects can use simple materials, a ruler, stopwatch, thermometer, phone camera, or school-lab equipment. Others may need a multimeter, light sensor, magnetic sensor, Geiger counter, or other specialized equipment.
Before choosing a topic, make a short list of what you can actually access. You can also look at best physics programs for high school students for structured research opportunities.
50 Physics Research Topics for High School Students
1. Electrical resistance and temperature in different metals
Select wires made of copper, aluminum, and nichrome, and measure how resistance changes as you gradually heat or cool them. You’ll learn how atomic vibrations at higher temperatures interfere with the flow of free electrons, increasing resistance. Try graphing resistance versus temperature to visualize this trend and compare it to theoretical models of resistivity.
Who is it right for? A good fit if you enjoy electrical measurements and materials science.
2. Solar cell efficiency at different light wavelengths
Set up a solar cell and shine LEDs of different colors to test how light wavelength affects energy output. Record voltage and current readings for each color, and analyze which wavelength yields the highest efficiency. You’ll explore concepts like photon energy, band gap, and the photoelectric effect, all crucial in quantum physics. This project shows how theoretical physics drives real-world innovations in solar technology and semiconductor design.
Who is it right for? A good fit if you want to connect optics and quantum physics with renewable energy.
3. Factors affecting the period of a simple pendulum
Experiment with pendulums of different lengths, masses, and release angles to test how these variables affect oscillation time. You’ll find that string length, not mass or angle, primarily determines the period under the usual small-angle approximation. Recording and graphing data helps you quantify measurement errors and experimental uncertainty.
Who is it right for? A good fit if you want a straightforward mechanics experiment with repeatable measurements.
4. Magnetic field strength around a current-carrying wire
Build a simple circuit with a straight wire and measure magnetic field strength at varying distances using a magnetic sensor or compass. You’ll see how field intensity decreases as you move away from the wire, following an inverse relationship predicted by the Biot–Savart law. You can also model your findings using graphing software for better visualization. This experiment deepens your understanding of electromagnetism and forms the foundation for studying electric motors and magnetic induction.
Who is it right for? A good fit if you are interested in electromagnetism and quantitative measurements.
5. Radiation shielding with different materials
Test materials such as lead, aluminum, and plastic using a Geiger counter and a low-level radioactive source or background radiation, where appropriate and under proper supervision. You’ll compare how effectively each material absorbs or blocks radiation and relate your findings to atomic density and composition. The results can be analyzed to understand exponential attenuation and shielding coefficients.
Who is it right for? A good fit if you have access to appropriate supervised equipment and are interested in nuclear physics.
6. Reflection and refraction at different angles of incidence
Shine a laser or flashlight through a glass block at different angles and measure both reflected and refracted rays using a protractor. You’ll compare your data with Snell’s Law to determine refractive indices and identify the point of total internal reflection. Try plotting sine values to visualize how angles of incidence and refraction are mathematically related.
Who is it right for? A good fit if you prefer visual experiments involving light and geometry.
7. Terminal velocity in different fluids and objects
Drop small spheres of varying mass and surface area through fluids such as water or oil, timing their motion until velocity stabilizes. You’ll analyze how drag, viscosity, and surface area balance gravity to create terminal velocity. Modeling your results using Stokes’ Law provides insight into fluid resistance. This study blends mechanics and fluid dynamics, showing how equations describe real-world motion from raindrops to parachutes.
Who is it right for? A good fit if you want to combine motion measurements with fluid mechanics.
8. Magnetic fields and chemical reaction rates
Conduct a simple redox reaction near magnets of varying strengths, and track reaction time or the rate of color change. You’ll explore whether magnetic forces influence ion motion or electron transfer in solution. Quantifying your observations introduces statistical thinking in experimental physics.
Who is it right for? A good fit if you enjoy projects that cross physics and chemistry.
9. Air pressure and the speed of sound
Use sound sensors or a smartphone app to measure the time it takes for sound to travel a fixed distance in environments with slightly different pressures, if the pressure difference can be measured reliably. You’ll test how changes in air density alter sound propagation speed. Comparing results with theoretical values enhances your modeling skills. This experiment introduces thermodynamics and wave physics, linking sound behavior to molecular motion.
Who is it right for? A good fit if you like sound, waves, and measurement-based experiments.
10. Energy transfer in a Newton’s cradle
Record a Newton’s cradle in slow motion and analyze how the motion of each sphere changes over time. You will calculate kinetic energy, potential energy, and energy losses from friction and air resistance. Comparing actual data to ideal elastic collision predictions shows how systems lose energy. This project aids in understanding conservation of momentum and energy through a clear, visual approach.
Who is it right for? A good fit if you want to study momentum and energy through video analysis.
11. Surface texture and frictional force
Set up an inclined plane and test how objects slide across surfaces such as sandpaper, glass, and plastic. Measure the angle at which motion begins to calculate the coefficient of static friction for each material. You’ll compare real-world data with theoretical models and explore the role of microscopic surface roughness. This project strengthens your grasp of Newtonian mechanics and highlights how friction impacts everything from car tires to robotics.
Who is it right for? A good fit if you want a simple mechanics setup with clear comparisons.
12. Standing wave patterns in strings and air columns
Stretch a string or use a resonance tube filled with air to generate standing waves using a speaker or tuning fork. Measure the wavelength, frequency, and node positions to verify resonance conditions. Plotting your results reveals the relationship between frequency and wavelength in fixed systems. This experiment introduces you to wave interference, resonance, and harmonics, concepts essential for acoustics and musical instrument design.
Who is it right for? A good fit if you are interested in acoustics, resonance, and wave behavior.
13. Gravitational potential and kinetic energy on an inclined plane
Roll a ball down ramps of varying heights and measure its velocity at the bottom using motion sensors or video analysis. You’ll calculate the theoretical versus experimental conversion of energy using conservation of energy. Observing differences helps you understand real-world energy losses due to friction and air drag.
Who is it right for? A good fit if you want to compare theoretical predictions with experimental results.
14. Measuring Planck’s constant with LED light
Use LEDs of different colors, a resistor, and a voltmeter to measure the threshold voltages required for each LED to emit light. Plot photon energy based on wavelength against voltage to estimate Planck’s constant from the slope. You’ll compare your calculated value with the accepted constant to assess accuracy. This experiment gives you hands-on experience with the principles of quantum physics that underlie modern electronics.
Who is it right for? A good fit if you want a more advanced project connecting electronics with quantum physics.
15. Spin speed and gyroscope stability
Spin a gyroscope at different angular velocities and measure how long it resists tilting under a constant torque. Record precession rates to see how angular momentum stabilizes motion. Graphing spin rate versus stability time reveals the underlying relationship predicted by rotational dynamics. This project deepens your understanding of angular momentum and its applications in navigation, aerospace, and robotics.
Who is it right for? A good fit if you are interested in rotation, aerospace, or robotics.
16. Water depth and wave speed
Generate waves in a shallow tray and measure their speed at varying water depths using a ruler and timer or a slow-motion camera. You’ll find that as depth increases, waves travel faster due to changes in restoring forces and fluid motion. Analyzing your data against the theoretical model helps you quantify this relationship.
Who is it right for? A good fit if you want to study waves using a simple physical setup.
17. Polarization filters and transmitted light intensity
Use two polarizing filters and rotate one relative to the other while measuring transmitted light intensity with a light sensor. You’ll test Malus’s Law and observe how orientation affects transmission. Graphing intensity versus angle reveals the cosine-squared relationship predicted by wave optics. This project builds your understanding of electromagnetic waves and helps you understand technologies such as sunglasses, LCD screens, and optical sensors.
Who is it right for? A good fit if you enjoy optics and precise angle-based measurements.
18. Coil density and electromagnet strength
Wrap insulated wire around an iron core, varying the number of turns in each trial while keeping the current constant. Measure magnetic strength using a Gauss meter or by counting the number of paper clips attracted to the core. Plotting turns versus field strength demonstrates a near-linear relationship under suitable conditions.
Who is it right for? A good fit if you want to explore circuits, magnetic fields, and electrical engineering.
19. Projectile motion and trajectory
Launch small projectiles such as marbles or foam balls at different angles and measure their range and height. You’ll compare your data to kinematic equations and can simulate trajectories using software such as Tracker or Python. Identifying discrepancies between theory and reality helps you quantify air resistance and launch error.
Who is it right for? A good fit if you want to combine physical experimentation with computational analysis.
20. Insulation and heat transfer in different materials
Wrap containers in different insulating materials, such as wool, aluminum foil, and foam, and measure temperature changes over time. You’ll quantify heat loss rates using thermometers or sensors and analyze which materials slow down energy transfer most effectively. Relating your findings to thermal conductivity explains why certain materials make better insulators.
Who is it right for? A good fit if you want to investigate thermodynamics using accessible materials.
21. Ball temperature and bounce height
Heat or chill identical balls, such as squash balls or tennis balls, and drop them from a fixed height to measure how high they bounce. You can calculate the coefficient of restitution from the ratio of bounce height to drop height and see how it changes with temperature. This shows how the internal structure of a material affects how much energy is lost as heat during a collision. Slow-motion video makes the bounce heights much easier to read accurately.
Who is it right for? A good fit if you want a simple mechanics experiment with a clear link to sports.
22. Rolling objects and moment of inertia
Race solid cylinders, hollow cylinders, spheres, and rings down the same ramp and time how long each takes to reach the bottom. You’ll find that shape matters more than mass or size, because objects with more mass far from their center need more energy to rotate. Comparing your times with predictions based on moment of inertia shows how energy splits between linear and rotational motion. You can extend it by testing cans filled with liquids versus solids.
Who is it right for? A good fit if you enjoy rotational motion and clean predictions you can test.
23. Springs in series and parallel
Hang masses from single springs, then from two springs connected in series and in parallel, and measure the extension each time. Using Hooke’s Law, you can calculate the effective spring constant for each arrangement and compare it with the theoretical values. You’ll see that parallel springs act stiffer while series springs stretch more. This connects directly to suspension systems, mattresses, and structural design.
Who is it right for? A good fit if you want a low-cost experiment with neat mathematical relationships.
24. Damped oscillations in a mass-spring system
Let a mass bounce on a spring in air, then submerge it in water or oil and record how quickly the oscillations die down. You can track the amplitude over time with video analysis and fit the data to an exponential decay model. Comparing damping in different fluids helps you connect oscillation theory to viscosity. The same physics explains shock absorbers in cars and vibration control in buildings.
Who is it right for? A good fit if you like combining experiments with curve fitting and data analysis.
25. Impact force and crumple zones
Drop an object, such as an egg or a phone running an accelerometer app, onto different cushioning materials and measure the peak deceleration. You’ll explore impulse and see how increasing the stopping time reduces the force of an impact. Testing foam, cardboard, and folded paper structures lets you compare how well each design absorbs energy. This project links directly to car safety, helmets, and packaging design.
Who is it right for? A good fit if you are interested in engineering design and safety.
26. Energy transfer between coupled pendulums
Hang two identical pendulums from a shared horizontal string, start one swinging, and watch the motion pass back and forth between them. Measure how long each energy transfer takes and test how changing the string tension or the distance between pendulums affects it. You’ll be exploring coupled oscillators and beat frequencies, ideas that also show up in molecules and electrical circuits. Video analysis helps you plot both amplitudes over time.
Who is it right for? A good fit if you find wave behavior and resonance fascinating.
27. Water volume and water rocket performance
Launch plastic bottle rockets with different amounts of water at the same air pressure and measure how high they fly. You’ll see that too little water gives weak thrust while too much adds weight, so there’s an ideal fill level somewhere in between. Analyzing the results introduces Newton’s third law, momentum, and the physics of thrust. Always launch outdoors with eye protection and adult supervision.
Who is it right for? A good fit if you want a hands-on project with a link to rocketry and aerospace.
28. Wing angle and lift
Place a model wing in front of a fan, mount it on a digital scale, and measure how the apparent weight changes as you tilt the wing. You’ll find that lift increases with angle of attack until the airflow separates and the wing stalls. Comparing flat, curved, and thicker wing shapes lets you explore Bernoulli’s principle and Newton’s laws in aerodynamics. Keeping the fan speed steady is key to getting reliable results.
Who is it right for? A good fit if you are curious about flight and aerospace engineering.
29. Draining water and Torricelli’s law
Poke a small hole near the bottom of a bottle, fill it with water, and measure how the water level and flow rate change as it drains. Torricelli’s law predicts that the exit speed depends on the height of water above the hole. Graphing water height against time lets you compare your results with the theoretical curve. You can then test how the hole size or shape changes the drain time.
Who is it right for? A good fit if you want to study fluid flow with everyday materials.
30. Temperature and viscosity of liquids
Heat or cool a thick liquid, such as honey or syrup, and time how long a small ball takes to fall a set distance through it. You’ll find that viscosity drops sharply as temperature rises, which you can calculate using Stokes’ Law. Graphing viscosity against temperature shows a nonlinear relationship worth modeling. This connects to engine oils, lava flows, and food processing.
Who is it right for? A good fit if you want to take the terminal velocity idea further with temperature as a variable.
31. Soap concentration and surface tension
Mix water with increasing amounts of dish soap and measure surface tension by counting how many drops fall from a pipette for a fixed volume. More drops mean smaller drops, which signals lower surface tension. You’ll likely see surface tension fall quickly at first and then level off, which introduces the idea of a critical concentration. This project sits right on the border of physics and chemistry.
Who is it right for? A good fit if you enjoy precise, repeatable measurements with simple tools.
32. Hull shape and buoyancy
Build small boats from aluminum foil in different shapes and add coins until each one sinks. You’ll relate the maximum load to the volume of water each hull can displace, using Archimedes’ principle. Comparing flat, deep, and rounded hulls shows how stability and capacity trade off. This connects to ship design and naval engineering.
Who is it right for? A good fit if you like building things and testing designs against each other.
33. Measuring the Doppler effect
Attach a buzzer with a steady tone to a string and swing it in a circle, or record a car horn as it passes, using a phone app that measures frequency. You’ll measure how the pitch rises as the source approaches and falls as it moves away. Comparing your frequency shift with the Doppler equation lets you calculate the speed of the source. The same principle is used in radar, weather forecasting, and measuring how fast galaxies move.
Who is it right for? A good fit if you are interested in sound and its links to astronomy.
34. Water level and glass resonance
Fill wine glasses or jars with different amounts of water and measure the pitch produced when you tap or rub the rim. You’ll find that adding water lowers the pitch of a struck glass, because the water adds mass to the vibrating walls. Using a frequency app, you can graph water level against frequency and look for a pattern. You can compare this with blowing across bottle openings, where the trend works the other way.
Who is it right for? A good fit if you enjoy music and want to explore the physics behind it.
35. Sound-absorbing materials
Place a sound source inside a box lined with different materials, such as foam, cardboard, fabric, or egg cartons, and measure the sound level outside with a decibel app. You’ll compare how well each material absorbs or blocks sound and relate the results to density and texture. Testing different frequencies shows that some materials work better on high pitches than low ones. This connects to acoustics, studio design, and noise reduction.
Who is it right for? A good fit if you want a practical acoustics project with real-world uses.
36. Chladni patterns on vibrating plates
Sprinkle sand on a metal plate attached to a speaker and play tones at different frequencies. At certain frequencies, the sand gathers along lines that stay still, called nodal lines, and forms striking patterns. You can record which frequencies produce patterns and how the patterns grow more complex as frequency increases. This project gives you a visual way to explore resonance in two dimensions.
Who is it right for? A good fit if you want a visually impressive project on waves and vibration.
37. Diffraction and laser wavelength
Shine a laser pointer through a diffraction grating, or reflect it off a CD, and measure the positions of the bright spots on a wall. Using the diffraction grating equation, you can calculate the wavelength of the laser or the spacing of the tracks on the disc. Comparing your results with the known values tests the accuracy of your setup. Never look directly into the beam or point it at anyone.
Who is it right for? A good fit if you want to measure something tiny using simple optics.
38. Lens focal length and image formation
Place a candle or light source at different distances from a convex lens and find where a sharp image forms on a screen. You’ll use the thin lens equation to calculate focal length and compare it with the manufacturer’s value. Plotting your data in the right form gives you a straight-line graph, which makes the relationship easy to check. This connects to cameras, eyeglasses, and microscopes.
Who is it right for? A good fit if you enjoy optics and want a project with a classic equation to test.
39. The inverse square law for light
Measure light intensity at increasing distances from a small bulb using a light sensor or a phone app. You’ll test whether intensity falls with the square of distance, as the inverse square law predicts for a point source. Plotting intensity against one over distance squared gives you a clear way to check the relationship. The same law applies to gravity, sound, and radiation.
Who is it right for? A good fit if you want to verify a core physics law with accessible tools.
40. Eddy current braking
Drop a strong magnet through copper, aluminum, and plastic pipes and time how long it takes to fall through each one. In metal pipes, the falling magnet creates swirling currents that produce a magnetic field opposing its motion, slowing it down dramatically. You can test how pipe thickness and material affect the fall time and connect your results to Lenz’s law. This principle is used in roller coaster brakes and high-speed trains.
Who is it right for? A good fit if you want a surprising electromagnetism experiment with simple equipment.
41. Magnet speed and induced voltage
Drop a magnet through a coil of wire from different heights and measure the voltage produced using a data logger or oscilloscope. You’ll find that faster-moving magnets produce larger voltage spikes, as Faraday’s law of induction predicts. Graphing peak voltage against speed lets you test the relationship quantitatively. This is the same physics behind electric generators and wireless charging.
Who is it right for? A good fit if you are interested in how electricity is generated.
42. Capacitor charging and discharging
Build a simple circuit with a capacitor, a resistor, and a battery, then measure how the voltage rises and falls over time. You’ll calculate the time constant and see how changing the resistance or capacitance affects charging speed. Fitting your data to an exponential curve builds strong data analysis skills. Capacitors are found in camera flashes, defibrillators, and almost every electronic device.
Who is it right for? A good fit if you want to explore circuits and exponential behavior.
43. Electrode materials in fruit batteries
Insert pairs of metal electrodes, such as zinc and copper, into lemons, potatoes, or other produce and measure the voltage and current. You’ll find that the choice of metals affects voltage much more than the choice of fruit, which links to the electrochemical series. Connecting cells in series and parallel lets you explore how batteries are combined. This project bridges physics and chemistry in a very accessible way.
Who is it right for? A good fit if you want a low-cost project that crosses into chemistry.
44. Wind turbine blade design
Build a small wind turbine connected to a motor used as a generator, and test blades with different numbers, lengths, and pitch angles in front of a fan. Measure voltage and current to calculate power output for each design. You’ll compare your efficiency with the Betz limit, the theoretical maximum share of wind energy a turbine can capture. This connects directly to renewable energy engineering.
Who is it right for? A good fit if you want to combine design, testing, and clean energy.
45. Surface color and radiant heat absorption
Paint identical containers different colors, fill them with water, and place them under a lamp or in direct sunlight while tracking their temperature. You’ll find that darker surfaces absorb more radiant energy and heat up faster. Measuring cooling rates afterward lets you explore how color also affects heat emission. This connects to solar water heaters, building design, and climate science.
Who is it right for? A good fit if you are interested in energy efficiency and climate.
46. Measuring gravity with a smartphone
Use a free app such as phyphox to measure the acceleration of a falling object or the swing of a phone on a pendulum. You’ll calculate the acceleration due to gravity and compare it with the accepted value of about 9.81 m/s². Repeating trials and analyzing sources of error builds strong experimental skills. You can also compare results from different methods to see which is most accurate.
Who is it right for? A good fit if you want to do real physics with a device you already have.
47. Orbital motion and Kepler’s laws
Write a simple Python program that simulates a planet orbiting a star using Newton’s law of gravitation. You’ll test whether your simulated orbits follow Kepler’s laws, including the relationship between orbital period and distance. Comparing different numerical methods shows how small errors can build up over time. This project is a strong introduction to computational physics.
Who is it right for? A good fit if you enjoy coding and want to explore astrophysics without a lab.
48. Exoplanet transit light curves
Download real brightness data from NASA’s TESS mission and look for the small dips that happen when a planet passes in front of its star. Using Python and a package such as Lightkurve, you can measure the depth and timing of each dip. The transit depth lets you estimate the planet’s size relative to its star. This project uses the same data professional astronomers work with.
Who is it right for? A good fit if you want to work with real scientific datasets.
49. Cosmic ray muons in a cloud chamber
Build a cloud chamber using a clear container, isopropyl alcohol, and dry ice, and watch for particle tracks forming in the vapor. You’ll see trails left by muons and other particles created when cosmic rays hit the atmosphere. Counting and classifying tracks over time lets you estimate how often these particles pass through. Dry ice and alcohol need careful handling, so work with adult supervision.
Who is it right for? A good fit if you are curious about particle physics and the universe beyond Earth.
50. The sunspot cycle
Download historical sunspot records from the Royal Observatory of Belgium’s SILSO database and analyze how sunspot numbers change over time. You’ll find a repeating cycle of roughly 11 years and can use graphing or Fourier analysis to measure it precisely. Comparing the strength of different cycles opens up questions about solar activity and space weather. This project needs only a computer and a spreadsheet or Python.
Who is it right for? A good fit if you want a data-driven project in solar physics.
What can you do after choosing a physics research topic?
Once you have a topic, narrow it to one measurable relationship. Decide what you will change, what you will measure, how many trials you need, and which physics principle you will use to interpret the results.
You can also read how to write a research question and what the key components of a high school research paper are before turning the topic into a full project.
Physics research questions students often ask
Yes. Mechanics, basic optics, waves, friction, energy, and heat-transfer topics can often be adapted to equipment available at home or in a school laboratory. The setup should match the measurements you need to collect.
Sometimes. Experimental topics are built around your own measurements, while some physics investigations can use simulations, published datasets, or existing measurements when appropriate. Your method should be clear about where the data comes from.
Yes. A focused question, manageable method, reliable measurements, and basic data analysis can be enough to begin a project independently. More complex equipment or advanced topics may require access to a lab or additional guidance.
No. You can develop a project independently with a focused question, manageable method, and reliable measurements.
If you want structured mentorship while developing a research project, you can explore the Horizon Academic Research Program. The program is a virtual research experience where you can develop a research paper with guidance and choose from a range of research specializations. You can find the application link here.
Image source: Horizon Academic Research Program