Not sure if this is just playing with the fact that a photon could be considered its own antiparticle in quantum field theory or if I missed the joke. Please, enlighten me.
Daily reminder that the World Wide Web was invented at CERN, so somewhere around the LHC highlighted in the picture. Who knows what the next big random innovation will be.
There's this (true) anecdote that precision measurements at CERN/LHC need to take into account the schedule of high-speed trains in the area because they cause tiny, yet measurable disturbances in the power grid.
It's not even coherent when the sun emits it. For one, it consists of a large range of wavelengths…
And I doubt there's a way to make light coherent at that order of magnitude.
I'm not sure about the easy-to-show part, but take a look at the Brightness Theorem / Conservation of https://en.wikipedia.org/wiki/Etendue if you want to learn more.
https://feddit.nl/post/16112837