Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: harcarmen on 08/02/2013 03:05:31

Title: How do a worm hole and black hole differ?
Post by: harcarmen on 08/02/2013 03:05:31
Hi! I am Carmen. Since i heard of worm hole and black hole, i am quite confused about these two terms. I want to know more about the difference between worm hole and black hole. Thanks!!!!!!!!!
Title: Re: How do a worm hole and black hole differ?
Post by: imatfaal on 08/02/2013 16:45:09
Black hole are strongly established in theory, and beginning to be well shown in observation.  They are a collapsed star in which the gravity is so high that they have imploded in on themselves and shrunk to an impossibly small size but retained all its mass - the gravitational attraction is so high that there is a place around them from which not even light can escape (we call this the event horizon). 

This fact that not even light escapes means they are black - hence the name, but it also means we cannot focus our telescopes directly at them (we see nothing).  But we do have pretty substantial indirect evidence of the existence of black holes at the centre of the spiral galaxy - and have measured their effects to good precision in these nearby galaxies.   By the way - because of the fact that no light can escape the event horizon we have no way of ever looking beyond the event horizon and all our physical models are in real trouble at the centre of the black hole (the possible singularity)

a wormhole is a highly speculative and hypothetical cosmological potential phenomenon - it is where strange and undiscovered "exotic matter" has acted in such a way as to open a shortcut between two sections of normal space. 

they are often spoken of in the same breath as one of the sources of the exotic matter and energy required to open a worm hole could be connected with the mysterious happenings inside the event horizon of a black hole and at the singularity. 
Title: Re: How do a worm hole and black hole differ?
Post by: Pmb on 09/02/2013 03:06:28
Quote from: imatfaal
Black hole are strongly established in theory, and beginning to be well shown in observation.  They are a collapsed star in which the gravity is so high that they have imploded in on themselves .
That is one of the ways in which black holes can form, i.e. stellar implosion. Another way is when two stars pass by each other their gravitational forces swing them around each other and then fling them off into different directions from their original paths. Typically one of the stars gets flung towards the center of the galaxy. Eventually this builds up the galactic core into a gigantic black hole. There are also primordial black holes which are objects formed during the universes early expansion when the matter density was extremely high. Micro black holes are an example of such black holes. In fact they might be the same thing but Im not sure.

 
Quote from: imatfaal
a wormhole is a highly speculative and hypothetical cosmological potential phenomenon - it is where strange and undiscovered "exotic matter" has acted in such a way as to open a shortcut between two sections of normal space. 

they are often spoken of in the same breath as one of the sources of the exotic matter and energy required to open a worm hole could be connected with the mysterious happenings inside the event horizon of a black hole and at the singularity. 
There is a relationship between the spacetime of a black hole and the spacetime of certain kinds of wormholes known as Schwarzchild Wormholes but Im not sure what it is. You can learn about it here --- http://en.wikipedia.org/wiki/Wormhole#Schwarzschild_wormholes
Title: Re: How do a worm hole and black hole differ?
Post by: Professor Mega-Mind on 31/10/2018 01:43:03
.........Black Hole vs Wormhole .
A black-hole is protected by solid theoretical physics .  A wormhole is protected by magic ( gray-zone fudge factors ) .
For understandable banter about black-holes , go to "Are BlackHoles really holes ?" or "Are Black Holes stars or holes ?" .
For understandable banter about wormholes , Bing up "Alice in Wonderland ." .
....P.M.
Title: Re: How do a worm hole and black hole differ?
Post by: Monox D. I-Fly on 12/11/2018 06:02:40
My definition regarding blackhole and wormhole is like this:
Blackhole = A hole in space which sucks everything close by and squeezes them inside.
Wormhole = A hole which will teleport you somewhere else once you enter.

Maybe you can watch the first episode of Power Rangers Super Ninja Steel to comprehend the difference easier. At the last episode of Power Rangers Dino Super Charge, Sledge was pulled to a blackhole in an attempt to crush him but then it turned out to be a wormhole which teleported him to another dimension (the main Power Rangers dimension) instead.
Title: Re: How do a worm hole and black hole differ?
Post by: Colin2B on 12/11/2018 08:46:59
Best to read these replies:
https://www.thenakedscientists.com/forum/index.php?PHPSESSID=7mb2rrnqadhkjentqpd4fu6r22&topic=46881.msg404696#msg404696
https://www.thenakedscientists.com/forum/index.php?PHPSESSID=7mb2rrnqadhkjentqpd4fu6r22&topic=46881.msg404716#msg404716

But in summary, blackholes are areas of intense gravitational atraction and are known to exist.
Wormholes are like woodworm digging a hole from top surface of a tabletop to the bottom surface, creating a shortcut from one side to the other. It is very unlikely that they exist, except in the extreme conditions of a blackhole, and even then unlikely.
Title: Re: How do a worm hole and black hole differ?
Post by: yor_on on 13/11/2018 21:46:28
Worm holes are very theoretical entities, close to science fiction. Black Holes, or some equivalent, is found to exist by indirect astronomical observations of the way light and mass 'distort' their paths in the vicinity of them. If I remember right you need 'exotic materials' to hold a wormhole stable, which is the same as asking for unobtanium, a infinitely rigid material that will hold even in a black hole.
Title: Re: How do a worm hole and black hole differ?
Post by: guest45734 on 14/11/2018 15:59:09
A wormhole is a Einstein Rosen bridge, and is completely theoretical, it might as suggested above not exist, however the ER = EPR conjecture does exist. https://en.wikipedia.org/wiki/ER%3DEPR . The ER theory was formulated about one month after the EPR theory, to explain entanglement. Entanglement does happen in nature and might be proof of wormholes, that can transmit qubits of information between different points in space considerably in excess of c.

Edit an ER bridge(wormhole) between two blackholes(lots of mass) may be a bigger version of an EPR bridge(wormhole) between two particles (with mass) or photons(with no mass).

No body believed in blackholes until they were discovered. Wormholes are one of the theories Einstein was involved with, only a fool would discard what Einstein says as pure fiction without sound reasons to do so. 





Title: Re: How do a worm hole and black hole differ?
Post by: saitejap on 14/05/2019 11:13:57
Even though both black hole and wormhole are consistent in theory, we surely know that black hole exists and we also got an image recently but we don't know whether wormholes exist in reality or not. One more distinguishing factor between black holes and wormholes is the Hawking radiation. Black holes lose energy through Hawking radiation whereas wormholes don't do that. Another difference is the Event horizon, a black hole has an Event horizon whereas wormhole doesn't have anything like that.
I hope this helps.                                                                                                                                     
                                                                                                                                           --via ScienceHook
Title: Re: How do a worm hole and black hole differ?
Post by: Professor Mega-Mind on 14/05/2019 11:23:34
...so then...
If I plunge into a naked wormhole , I will be ejected from the other end as a spray of GUT.-matter ?
P.
Title: Re: How do a worm hole and black hole differ?
Post by: lasikkawade on 15/05/2019 09:37:39
Thanks for your valuable reply.well done :)
Title: Re: How do a worm hole and black hole differ?
Post by: Colin2B on 15/05/2019 10:35:12
Thanks for your valuable reply.well done :)
Thank you for your weak attempt to spam us.
Weve changed your spam link and are pushing you up your own private wormhole.
Bye
Title: Re: How do a worm hole and black hole differ?
Post by: jeffreyH on 15/05/2019 21:59:16
Sounds painful.