video: quantum levitation

Came across this today. They even tease you with just enough of a physics explanation to get you curious.

How it works

According to the website, the ceramic, once brought down to a low enough temperature, becomes a superconductor (more like a super-duper conductor as they claim zero energy loss).

Now that it is a superconductor, the magnetic field attempts to avoid it, so where it would usually penetrate the disc, it now goes around it for the most part. In some places it penetrates the disc where the superconductivity is weak. These weakened locations are discrete (i.e. grain boundaries), so they act to constrain the disc from moving.

Awesome.

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