// interactive physics, in your browser

Physics you can
actually touch.

Hands-on instrument simulations with randomly generated practice problems, guided solutions and instant feedback. No installs, no sign-ups — just open and explore.

Simulations

Vernier Callipers

LIVE

Drag the jaws, read the coinciding division, master zero error — then test yourself on endless random problems.

MeasurementZero errorPractice mode
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Screw Gauge

LIVE

Micrometer precision — turn the thimble, read the circular scale and master zero error down to 0.01 mm.

MeasurementZero errorPractice mode
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Simple Pendulum

LIVE

Time period vs length and gravity — run virtual experiments and plot T² against L.

MechanicsOscillationsPractice mode
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Circuit Lab

LIVE

Build your own circuits — batteries, resistors, bulbs, LEDs, motors and switches with live current-flow analysis.

ElectricityOhm's lawPractice mode
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Ray Optics

LIVE

Drag objects past lenses and mirrors — watch 3 principal rays form real and virtual images in real time.

OpticsLenses & mirrorsPractice mode
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+

Electric Field

LIVE

Place charges and watch field lines flow — drag to explore dipoles, like charges and superposition in real time.

ElectrostaticsCoulomb's lawPractice mode
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Projectile Motion

SOON

Launch, trace and tweak — angle, speed and gravity with live range and height readouts.

MechanicsKinematics
In the workshop…