Name: ブラックホールに堕ちる（NEWS） - 60のシンボル (Falling into Black Holes (NEWS) - Sixty Symbols)
Uploaded: 2021-01-14T10:32:37.000Z
Duration: 10 min 41 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

So there have been two papers published this week about one of our favorite subjects, and that's black holes in particular.

Now I've gone and spoken to Tony all about it, and he's given a bit of an overview of what's in the papers.

Also in this video, I've done a few illustrations and graphics just address things up a little bit, so don't take them too seriously.

If you do want to read the papers themselves and see the slightly more dry diagrams in the papers, go and have a look at them.

I've put the links in the video description.

Under this video, they're free to go and have a look at.

But I should warn you, there are a little bit on the complicated side.

Every morning we read our academic papers that have come out on did was speed something really interesting happening today and then this week.

Basically, we were rethinking what we think happens when you fall into a black hole.

There's some real big shots over in their California that sort of they this one paper out this one out A couple of days ago, there was this one by Lenny Susskind, which was out today, which is sort of completely rethinking what happens when you fall into a black hole.

So the way that we traditionally thought of what happens in a CZ you fall into a black hole.

It kind of depends on whose perspective you're taking it from.

So if you imagine me new Brady, we went to a black hole.

You stayed on the outside of the black hole and annoyingly decided to chuck me in.

So I'm falling towards the black hole's over there somewhere.

So I'm drifting towards accelerating towards it.

So you see, sort of essentially time slowing down for May, so as if I'm suspended.

Imagine the event horizon of the black hole is here.

As I approach it, your time is slowing down from your what you see on literally ill as they approach the event horizon would then stop.

This is all happening on this what's called a stretched horizon, which surrounds its a little region that surrounds the event horizon.

Well, literally, I would sort of burn up.

And then I will come back to you as a stream of hawking radiation.

This is the type of radiation which comes out of a black hole, which spares the name of Stephen Hawking.

Now, that's what you saw watching me fall into a black hole.

Okay, now what would I see as I fell into the black hole?

We thought there was nothing really special about a black hole event horizon.

It's not a region of strong curvature, strong, strong gravitational fields.

It's just a place in space where something where does happen.

But there's nothing strong about the gravitational fields there on because of that by Einstein's principle of equivalence, nothing really weird should happen as you cross it.

And indeed that's what we thought was the case that as you cross a black hole event horizon.

I'm falling through the black hole, the rent.

Okay, maybe some effect time effects of, you know, our relative juice for relative velocities.

But generally within the reed, I wouldn't see anything remarkable happens across the horizon.

Eventually, after a long time, it was a big black hole.

I would approach the black hole singularity, which is miles back over there now.

Okay, But I would approach a black or similarity there.

There are strong gravitational fields there.

I would turn to spaghetti on, Do you know it would be Good night, May And then I actually me.

That sounds like a whole bottle through these papers.

The other which came out today, It discussing that process.

Think everyone still agrees on that, but from the point of view of the guy falling in.

So this statement that nothing much happens as you cross the black hole horizon.

People aren't saying that's the case now.

These guys in Santa Barbara and at Stanford who you know, have made their names in various of the topics and physics and un, including black hole physics and the's a big guys.

What do I see now is I fall into the black hole while it's a lot more unpleasant, essentially is you approach the black hole horizon.

You just get across it on, then splats you hit what's called a firewall.

Or you could see that essentially the black hole horizon.

If the black hole is old enough, it has to be an old enough black hole and the horizon will tenant of firewall and you literally space and time would just end for you, essentially like a black hole singularity.

But now it's jumped right out towards the event horizon.

I don't think I fully understand it myself, you know, as I said, I only read this paper smarting, So yeah, it's still absorbing it and okay, so let's give it a go.

They're applying quantum mechanics in the logic of quantum mechanics, to a black hole to come to this conclusion.

In particular, I said here said at one point that this black hole had to be an old enough black hole.

What I mean by old on old black hole in this context is one that is in myth.

Admitted you know, at least half of the information it contained when it was formed.

Okay, so you know, black holes forms and it gives off this radiation.

It's admitted that more than half of that radiation, if that's the case, then you have something important happens.

So I went to imagine basically a little bit of radiation, which came out early on a little bit.

Or it's cool out late and it's sort of sitting on the edge of the stretch, rising.

If the black hole is old enough, those two bits of radiation, they're entangled.

Those two points are entangled, as in the exterior region, where all the radiation is on the edge of the Stretch Horizon base.

I mean essentially know about each other.

If I know about the radiation out here, I could know about the radiation sort of on the edge of the horizon.

They're supposed be nothing special about the black hole horizon.