The Mystery of Empty Space 4

Clip 4 from a 43 minute lecture, 'The Mystery of Empty Space: Higgs Bosons, Vacuum Energy and Extra Dimensions', May 2001. Full lecture- http://www.ucsd.tv/library-science.asp?detail=02&showID=5551 Blog summarizing the cosmological constant problem- http://blog.myspace.com/index.cfm?fuseaction=blog.view&friendID=120129993...

Category:

Science & Technology

Tags:

• Higgs
• field
• mechanism
• boson
• vacuum
• dark
• energy
• string
• theory

[kamyarghofrani]

if you expand a part of universe it will have more vacuum so it will have more energy, so you will have more energy in total but it can't happen; can it?

[stevebd1]

This is something I've looked at in a blog entitled 'Conservation of energy, the first law of thermodynamics and dark energy' which you can find posted on my Myspace page or over in the blogs section at Physics Forums, (just follow the links on the channel page). I can't guarantee it's 100% correct but it does look at the issues involved.

[benamukee]

the big rip

[CACBCCCU]

Here's an exercise: Find 50 examples of ring galaxies. Look for galaxies similar to ring galaxies, like a galaxy core with arms spiralling around the surface of a large toroid where the toroid's hole is similar to the open space betwen ring and core in a ring galaxy. It all looks like a quantum gravity wave phenomenon to me, like GR times a cosine wave-function of distance from the core mass puts the ring at a local downwelling in the gravitational field, produced by the cosine factor.

[kamyarghofrani]

and the fact that the night sky is dark, is a proof that the universe infinite, or at least the amount of matter in it is.

but GR, does say that the universe in finite. GR is one of the fundamental theories, so if you dont agree with GR, i dont thing you would agree with quantum theory.

are you a philosipher?

[kamyarghofrani]

are you suggesting that you dont believe in the big bang :O

[runelord37]

theoretical physics go back and forth on that so much its not even worth discussing. the whole thing is, you cannot disprove a multiverse, evidence is nice, very effective. however i am not personally a scientist nor do i subscribe to the scientific method solely. science will catch up to much of philosophy eventually as tools and mathematics evolve and improve in scope and compass, however the evidence there is , that im aware of, cannot limit the universe only the local physical universe.

[kamyarghofrani]

of course but if you believe in GR, or even aby theory that has the big bang, it will say that its finite.

we have more evidence of it being finite than infinite.

[runelord37]

no actually we dont know its finite. its just happens to fit some theories , there are ofcourse counter theories. and nothing is proven as of yet. still a physical limit to our local universe would mean little if ones postulates a multiverse model

[kamyarghofrani]

when i say part, i mean any part.

and we do know that its finite, (at least according to our theories)

and we do know that its expanding faster than it was before.

[runelord37]

infinity "contains" the universe

[runelord37]

how do you expand "part" of a universe. if you dont understand or cannot predict its actual size or are able to say whether its finite or infinite, there is no way to determine increase in an unknown quantity