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Pick a light experiment. Drag mirrors and lenses right on the picture!
Scenes
Sliders
Everything updates live. You can also drag mirrors, prisms and lenses on the picture.
Readouts
Challenge
Stars
Learn
Help
Drag a mirror to swing it. Drag a lens sideways to move it. Sliders do the same with numbers.
Keys
R reset · A random · F flow on/off · ← hide this panel
Save
Stars are saved on this device and in the save file. Every ray follows the real laws of light: reflection, Snell's law, the lens equation.
Practises looking skills and light science. Not a treatment.
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