Topic
It is the most precisely tested theory in science, and it still will not tell us what it means. What quantum mechanics says, the experiments that forced it on physicists,…
Quantum theory has two rules for how states change and no agreed account of when the second one applies. A century on, experiments are finally narrowing the options.
Quantum tunnelling lets a particle cross a barrier it does not have the energy to climb. It is why uranium decays, why the Sun can shine at a mere 15…
The uncertainty principle turns 100 next year, and it is probably the most misquoted idea in physics. Werner Heisenberg never called it a principle. The exact inequality in every textbook…
Schrödinger's cat is the most famous image in quantum physics, and it is almost always told backwards. In 1935 Erwin Schrödinger did not claim a cat could be alive and…
In late 1925 Peter Debye told Erwin Schrödinger that talk of electron waves was childish without a wave equation. Within weeks Schrödinger had one, and a century later it still…
Fire electrons one at a time at two slits and they land as single dots, yet the dots build up into the stripes of a wave. Try to find out…
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