Atlas Trail
The Instruments That Hit Their Limits
Four instruments this wave researched in depth, each one built to work around a hard physical limit: the telescope's aperture-resolution tradeoff, the cyclotron's relativistic ceiling and the synchrotron built to beat it, the seismograph's move from a swinging pendulum to an electronic feedback loop, and the Van de Graaff generator's simple mechanical trick for building up millions of volts.
Stop 1 of 5.
Instruments
Where the aperture race started: Galileo's 1609 spyglass, and the square-of-diameter rule every telescope built since has been chasing.
Stop 2 of 5.
Instruments
Lawrence's elegant trick for reusing one accelerating gap, and the relativistic wall it eventually hit.
Stop 3 of 5.
Instruments
The fix for the cyclotron's limit: ramp the magnetic field with the particles' own rising energy, a principle two physicists discovered independently a year apart.
Stop 4 of 5.
Instruments
From a pen on a paper drum to an electronic feedback loop measuring corrective force instead of raw displacement.
Stop 5 of 5.
Instruments
A moving belt and a comb-shaped electrode, built to feed early particle accelerators, now equally at home as a museum hair-raising demo.
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