Simulation Deck - Turning Points
Turning Points Laboratory
Where a clean idea hits a boundary condition and physics has to decide what is real. Newton's refraction. Relativistic time. The moment intuition breaks - and then gets rebuilt.
Crookes' tube (cathode rays)
Live
The discharge tube era. Watch the beam, steer it, and connect the observations to electrons.
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Hertz (UV & the spark gap)
Live
The clue that shouldn’t exist: ultraviolet makes the spark behave differently. Something is leaving the metal.
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Michelson–Morley interferometer
Live
The most awkward null result in physics. Rotate the apparatus and watch what refuses to change.
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Fizeau (toothed wheel)
Live
A gear, a distant mirror, and a disappearing beam. Measure c with Victorian stubbornness.
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Newton's corpuscular refraction
Live
The elegant mistake - what Newton needed to assume, and why it collides with wave behaviour.
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Time dilation (special relativity)
Live
Two clocks. One slider. Watch proper time become the obvious choice.
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More turning points
Under construction
This section will grow - but only when each sim earns its place.
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