741 views

14:03 L

Watch
- Search Videos
  
  Advanced search »
- Submit a New Video
Discuss
About
- Try clicking on the various channels to see videos posted to that channel - if you're into music you can click the Music channel to get more music sifts - go on and explore! Use the "hotness" when you have opened the channel link to get videos that have gotten a lot of votes, or use "newness" to have a look at the new sifts.
  When browsing sifts you like, have a look at the Related Posts list to see other related videos, click the tags under the video title to see more sifts tagged with the same tags or have a look at other sifts from the same user in the More Posts By list. If the sifted video is in a play list, have a look at the play list to see other interesting videos the Sift users have linked together.
  Enter the Sift Lounge to chat with online sifters about anything and everything, or read interesting posts in the Sift Talk forum.
  The Top New Videos list is always full of interesting, current videos. It is always recommended that you have a look through the Top New Videos, but also have a look at these:
  - Upcoming Unsifted Videos - active video submissions that neither are published to the front page nor archived to the submitter's personal queue
- Have you seen a really funny, surprising, scary, interesting, cute or in any other way extra good quality video?
  Post and share it here - VideoSift is the best video aggregator on the Web, where we share, discuss, promote, and interact with the best videos out there on the web. Post it here, and share it with the large community of video-interested users. And - you are guaranteed to find more very good videos here already!
  Mind you, we only share videos you discover that someone else has made; if you "self link," by posting a video you have made, have posted or have interests in, you risk the ban hammer - read the posting guidelines before posting. The sift is NOT for promoting your own videos - it is for sharing videos others have made.
  Submit a Video Now »
Login

Did Stephen Hawking just kill the concept of a black hole?

submitted by radx

1 decade 4 months ago

Stephen Hawking replaces the event horizon with his concept of an apparent horizon, based on the idea that the evaporation of a black hole allows previously trapped particles to escape after all. So the more ephemeral apparent horizon is similar to an event horizon but with an expiration date attached to it.

No event horizon, no classical black hole. It's still there, but the inclusion of quantum mechanics requires a revision of the concept of an event horizon.

So he didn't kill it, he didn't steal it, he just illuminated shortcomings of current theories. Shit got more complicated. Again.

Oh, and he killed firewalls in the process, apparently.

10 Comments

Very cool *promote

Promoting this video and sending it back into the queue for one more try; last queued Friday, January 31st, 2014 12:26pm PST - promote requested by eric3579.

*related=http://videosift.com/video/The-Dark-Side-of-Time

The Dark Side of Time has been added as a related post - related requested by chingalera.

event horizons are relative.

criticalthudjokingly says...

…no conjecture here!

so, we can just call them temporary very-dark-gray-holes.

He questions himself. A great scientist. Amazing. Very few exist.

quote from a friend of mine:

i just love that the scientist that is largely responsible for the theory, and has been working on it for 20 years, has stood up and said, nup, we got it wrong, now it's this

take that, religion

He questions himself. A great scientist. Amazing. Very few exist.

Religious people would say smuggly, "Of course he changed his mind, he's human -- our God got it right the first time. Take that science!"

quote from a friend of mine:

Discuss...

🗨️ Emojis & HTML

Enable JavaScript to submit a comment.

This website uses cookies.

This website uses cookies to improve user experience. By using this website you consent to all cookies in accordance with our Privacy Policy.