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> EM already propagates across the known universe. I meant it in the sense that EM will be attenuated by gas clouds and solid matter due to the high interactio
by 21 8y ago
> EM already propagates across the known universe.
I meant it in the sense that EM will be attenuated by gas clouds and solid matter due to the high interaction rate of EM, while neutrino (or presumably dark matter) much less so.
- marshray 8y agoIf it doesn't interact with gas clouds how do you build an efficient detector to receive it?
- 14 8y agoSince we are allowed to step outside the realm of current known physics I imagined what if we could produce a yet discovered energy that could travel faster then light and could also pass through matter. And lets for the sake of this hypothetical discussion say that we could prove there is no possible way to produce this energy without doing it intentionally, ie intelligent life producing it. I also picture this energy interacting only with itself in a way we can detect(it flashes or something). We could build an emitter and watch for the flash. Since it only interacts with itself and only is produced intentionally and not all over the universe occuring naturally we would know we have detected someone else sending the signal.
- saagarjha 8y agoBut then you have the issue that the communication doesn't actually interact with the detector you've built to receive signals.