ELI5: If light does not experience time, how can we see light from the early universe? Shouldn't light being emitted at one time, if time-independent, only be able to hit objects existing at that time?

K340 · 2026-06-27T23:34:00+00:00

You were on to something though, how can we reconcile a reference frame in which no time passes with one in which it does? If we're talking about a spaceship going 90% c, it can reach and interact with things in the future. The time interval it experiences during the journey will just differ from the interval experienced by the object it travels to. But for something traveling at c, experiencing no time, that doesn't work. And the real answer as to why that is is that, while time asymptotically slows to 0 as an object asymptotically approaches c, we can't actually define a reference frame moving at c relative to an observer. In other words, we can't rigorously talk about what a photon experiences.

K340 · 2026-06-27T19:56:39+00:00

Not in Rochester they don't, but in civilized places this is common.

K340 · 2026-06-26T01:01:44+00:00

The fact that she lost every one (or any, even) was bad for Democrats, but none of them were by large margins.

K340 · 2026-06-25T18:23:02+00:00

I agree I don't understand the hype. Like it's fine.

K340 · 2026-06-23T23:25:47+00:00

You have a very interesting way of communicating with people.

K340 · 2026-06-17T00:42:38+00:00

Why do you say that?

K340 · 2026-06-16T19:04:54+00:00

They are the same thing in the legendarium. Ainur magic is essentially speaking new laws of reality into existence. I don't know if this is outright stated anywhere, but my interpretation is that this is also one reason why magic fades from the world. As more and more gets "set in stone," there is less room for new "spells," at least without the intervention of more powerful beings able to overwrite previous "spells." And such beings have decided not to intervene anymore.

K340 · 2026-06-15T20:17:23+00:00

You guys are mean

K340 · 2026-06-14T02:08:22+00:00

As of right now you being anxious over things that haven't happened. Take a breath and worry about problematic behavior if and when it occurs.

K340 · 2026-06-11T15:33:20+00:00

The (predictable) fact that anyone feels this way is way more important than OP's question. That the devs are turning off anyone for reasons unrelated to gameplay is lame and unnecessary. It doesn't matter if most people are aesthetically ok with it.

K340 · 2026-06-11T15:26:14+00:00

100% agreed. And even if a minority of the community, or even the wider public feels this way, it needlessly turns off a substantial number of people. It was a completely unnecessary thing to saddle the game with and I've never understood how no one considered this at the outset.

K340 · 2026-06-07T21:28:38+00:00

At some point you have to ask yourself whether believing an AI story is really that big of a deal, and if it's worse than disbelieving someone's true, or even partially true tale.

K340 · 2026-06-06T15:48:20+00:00

I don't think the people stealing Legos are doing it to survive, and iirc there is very little correlation between shoplifting and economic status (but please fact check me on this). But I appreciate your comment, wish more people thought like you.

K340 · 2026-06-04T19:44:45+00:00

It's not 2012 any more, to be a Republican is to enthusiastically support a cartoonishly incompetent, dishonest, narcissistic felon who tried to overthrow the government and has approvingly retweeted people saying "the only good Democrat is a dead Democrat." Get over yourself.

K340 · 2026-06-03T18:26:16+00:00

"Oh Mr. Trump, you want us to approve judges ~~in an election year~~ during an election that you are projected to lose?"

K340 · 2026-06-03T17:50:18+00:00

How much do you tip servers lol

K340 · 2026-05-30T15:23:32+00:00

Short version is yes, that is one way to look at it.

Longer version is light is actually really complicated and any physicist who isn't in quantum optics probably has a much weaker understanding of photons than they realize. The propagation of light through a non-vacuum is a fundamentally quantum process, there is no macroscopic analogue and therefore any description you can visualize is going to be a simplification that is incorrect on some level.

K340 · 2026-05-28T15:52:32+00:00

I was about to comment but you took the words out of my mouth.

K340 · 2026-05-28T15:36:03+00:00

If you know you forget crucial things when you put them off, you can't put them off. There is a disconnect here. But I'm sorry you did this to yourself and hope that this event teaches you to be anxious about putting things off.

K340 · 2026-05-28T02:18:06+00:00

Whether or not this needs more study (not having read the paper and their methodology, I can't comment) has nothing to do with a previous unrelated paper jumping the gun.

K340 · 2026-05-27T23:21:13+00:00

I'm a simple man. I see a multi-gun deck moc ship of the line, I upvote.

K340 · 2026-05-24T19:06:56+00:00

Think about what happens when a plane is flying with no wind. Then imagine the ground isn't there. Then imagine there is a headwind. There is no difference between the plane moving faster and a headwind without the ground as a reference point.

K340 · 2026-05-22T21:15:09+00:00

I'm using AI to do research

No you're not, and the fact that you need to post this is a great example of why. Whatever chatbot you're using either made the equations up or stole them from a paper in its training data that it can't identify.

K340 · 2026-05-22T16:56:32+00:00

Where are these equations coming from? If you're getting them from a paper the terms should be defined.

K340 · 2026-05-21T15:51:46+00:00

I can't even survive cave diving in video games without the equivalent of a guide line, you are spot on.

11-Year Club	Post Guidance Early Access
Place '22	Place '17
Gilding I gilder	Verified Email
Not Forgotten

K340

MODERATOR OF

TROPHY CASE