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No because a single photon doesn't *experience" the whole universe but only the points where it's emitted and absorbed and you could say all the points in betwe
by ithkuil 3y ago
No because a single photon doesn't *experience" the whole universe but only the points where it's emitted and absorbed and you could say all the points in between along the geodesic between the emission and absorption events
- euroderf 3y agoSo if it is never absorbed, flying on thru the vast emptiness of space, does it experience the sum total of the existence of the universe ? (along that geodesic, of course)
- ithkuil 3y agoAh yeah, along that geodesic, which is far from the total of the universe. But I think I now understand that meant "total duration of the existence of the universe". I think an answer to that question depends of what you mean by total duration of the universe. If the photon never gets absorbed by anything, then it goes in forever. If it exists then the universe still exists forever since at least one photon exists forever.