Physics · Modern Physics
Measure Planck's constant with LEDs
Find the turn-on voltage of LEDs of different colours and get Planck's constant from the slope.
- Advanced
- 2–7 days
- 250–500
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Physics · Modern Physics
Find the turn-on voltage of LEDs of different colours and get Planck's constant from the slope.
Physics · Current Electricity
Plot current against voltage for a resistor and a bulb and explain the difference.
Physics · Oscillations
Time pendulums of different lengths and get the acceleration due to gravity from a straight-line graph.
Physics · Optics
Split light with a CD and compare the spectra of the Sun, LEDs, CFLs and flames.
Physics · Magnetism
Use the phone's magnetometer to measure how field strength falls with distance from a magnet.
Physics + Music, Theatre and Writing
Measure how the length of a string or the water level in a bottle changes the pitch.
Physics · Dynamics
Make parachutes of different sizes and shapes and time their fall with the same load.
Physics + Astronomy and Space
Measure how fast sunlight heats blackened water and estimate the solar constant.
Physics · Mechanics
Chill and warm identical balls and measure how bounce height changes with temperature.
Physics · Waves
Drive a stretched string with a small speaker and find how frequency depends on tension.
Physics · Fluid Mechanics
Use the drop-weight method to compare the surface tension of water, soapy water and oil.
Physics · Oscillations
Film a pendulum losing amplitude in air and in water and test whether the decay is exponential.
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