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The fact that a photon was emitted is, itself, information. It means there's a star out there to absorb it. Of course stars aren't the only things that would a
by Filligree 9y ago
The fact that a photon was emitted is, itself, information. It means there's a star out there to absorb it.
Of course stars aren't the only things that would absorb photons in this manner, but they'd absorb a lot more than other objects, and you could probably do something with the spectrum as well.
- lisper 9y ago> It means there's a star out there to absorb it. No, it doesn't. If it did, then flashlights would behave differently depending on what you were pointing them at.
- Filligree 9y agoWe're talking about hypothetical time-reversed light, not the usual kind.
- lisper 9y agoWhat does it mean for TR-light to be emitted and absorbed then? Does TR-light carry positive or negative energy? Because if it carries negative energy, and it is absorbed before it is emitted, then TR-light behaves exactly the same as regular light. You've just swapped the meaning of "emitted" and "absorbed".