Sean Carroll

Okay, not that much radiation, admittedly, especially for a big black hole.

But he, again, has an equation that predicts exactly how much you should see.

The second thing is we have this feeling, no one's ever done it, but we have this belief that if you fall into a black hole, you see nothing special when you cross the boundary, when you cross the event horizon.

horizon, right?

It just looks like ordinary empty space everywhere.

But these two statements seem a little bit contradictory because if I'm standing far away and I see radiation coming out and then I just fall in, right?

I just, I stopped, you know, my rocket ship or whatever.

I let myself fall in, you know, Neil, that you should see that red shift, that, that radiation get blue shifted.

It should look brighter and brighter and more and more energetic, right?

So why does it turn off when you hit the event horizon?

What actually happens?

What is it that you see?

And it turns out this is 100% implicit in all the equations that we have, but it took a lot of work to actually pull it out.

And the answer, in a very short, slightly oversimplified form, is there is high-intensity radiation when you're crossing the event horizon, but your move

Wow.

Yes.

Wow.

Yeah, exactly right.

And by the way, before I forget, I got to give huge credit to Chris Shalhoub, my co-author on this.

Your co-author, yes.