Cherenkov exists in all media except vacuum. It is when electrons travel faster ... | Hacker News

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omgJustTest 4 months ago | parent | context | favorite | on: GoPro Ride Through an Electron Beam Irradiator at ...

Cherenkov exists in all media except vacuum. It is when electrons travel faster than speed of light in the media (in this case air).

In vacuum they are limited by the speed of light.

For example: https://www.mpi-hd.mpg.de/hfm/CosmicRay/ChLight/Cherenkov.ht....

Also, hello! my name is Ryan & we are likely in the same field.

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