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'Negative Time' Really Does Exist, New Experiments Suggest (www.sciencealert.com)
submitted 3 months ago by to c/science@mander.xyz
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[–] 15 points 3 months ago* (1 child)

Photon comes out before it goes in.

I don't really understand it either, but keep in mind this is happening at nearly lightspeed, so it's not like the detector is lighting up right before they press the button to emit the photon.

Which makes me wonder, what happens if you combine this with "slow light" effects?

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  • [–] 1 point 3 months ago (1 child)

    But only after a decision was made by a person to create the photon? Because otherwise that would be pretty spooky.

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  • [–] 2 points 3 months ago (1 child)

    Yeah, it's only once the photons in front of it could already have gotten there, so it's like photons from the tail end of the pulse are catching up to the front as it emerges, even though they haven't even entered the cloud yet.

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  • [–] 1 point 3 months ago

    Yeah that's pretty weird but nobody could ever notice unless they knew what to look for. Now, if you had light beams coming out of there like 3 seconds before pressing the buttons, that would be scary weird.

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