As I understand it, if you were a photon this trip would be instantaneous from your perspective due to time dilation. You emit from the event, you collide with and energize some particle billions of light years away at the same exact moment.

But what if you never hit anything? Do you experience time then? Seems that no collision is likely in a mostly empty, but finite universe.

Or perhaps the universe is infinite, making it a certainty that you hit something eventually. In that case every photon hits something, almost implying a conservation of photons.

I thought that was interesting to ponder…

[–] overzeetop 3 points 1 year ago

Do you experience time then? Seems that no collision is likely in a mostly empty, but finite universe.

Every golfer knows that trees are 90% air, and yet the chance of a golf ball passing through one without hitting anything is demonstrably zero.

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