August 26, 2010 § Leave a comment
Erik Verlinde The theoretical physicist believes that gravity is an emergent phenomenon, not the elemental “force” that Newton and Einstein theorized it to be. He thinks it is the result of patterns of complex, microscopic phenomena.
Vodpod videos no longer available.
- Gravity is a consequence of the laws of thermodynamics (3quarksdaily.com)
- “What if our dreams are right and gravity is just an illusion?” and related posts (letterfromhere.blogspot.com)
- What is Heat [The Scientific Indian] (scienceblogs.com)
August 11, 2010 § 1 Comment
Whether you agree with him or not, this is great time-line in the history of physics. Philip Gibbs is fast becoming one of my favorite physics bloggers. Not because of his opinions, (I have no idea who’s opinion to believe.)but because of the detail of his explanations. I guess what I am saying is, he describes physics at a level I understand. He doesn’t write in technical jargon that only physicists can understand. And, he doesn’t dumb it down for the masses like… a couple of other guys I just decided not to name. (Because I like and respect them)
via viXra log By Philip Gibbs
August 9, 2010 § 1 Comment
“And so space-time – the malleable fabric whose geometry can be changed by the gravity of stars, planets and matter – was born. It is a concept that has served us well, but if physicist Petr Horava is right, it may be no more than a mirage. Horava, who is at the University of California, Berkeley, wants to rip this fabric apart and set time and space free from one another in order to come up with a unified theory that reconciles the disparate worlds of quantum mechanics and gravity – one the most pressing challenges to modern physics.” Read the full story
August 3, 2010 § Leave a comment
Once again our concepts of reality are being challenged. I just love that. This time it is the sacred gravity, what fun. This was a mind bending read, especially having just re-watched the Matrix last night. Not that there is any connection, I am just drawing a correlation to everything being an illusion.
“It’s hard to imagine a more fundamental and ubiquitous aspect of life on the Earth than gravity, from the moment you first took a step and fell on your diapered bottom to the slow terminal sagging of flesh and dreams.
But what if it’s all an illusion, a sort of cosmic frill, or a side effect of something else going on at deeper levels of reality?
So says Erik Verlinde, 48, a respected string theorist and professor of physics at the University of Amsterdam, whose contention that gravity is indeed an illusion has caused a continuing ruckus among physicists, or at least among those who profess to understand it. Reversing the logic of 300 years of science, he argued in a recent paper, titled “On the Origin of Gravity and the Laws of Newton,” that gravity is a consequence of the venerable laws of thermodynamics, which describe the behavior of heat and gases.” Please read the full Story
August 3, 2010 § Leave a comment
Do you remember the scene in Star Trek where they did the sling shot around the sun to pick up enough speed to go back in time. Well, this is not what they are talking about. It just made me think of that. I thought I would share a geek moment with you.
“Experts are intrigued by the fact that while the acceleration is tiny and has no significant effect on NASA missions, it holds great interest because no explanation based on conventional physics and understanding has been found. The effect is so persistent that it could indicate some physics not considered in previous attempts to explain the motions of bodies in the universe.
In 1998, for example, NASA’s NEAR Shoemaker spacecraft had its speed boosted by an additional 13.5 millimetres per second. There are many examples of this, but no explanation – which raises the tantalizing possibility that it could be a sign that a whole new branch of physics is waiting to be discovered.” Read the full story
August 2, 2010 § Leave a comment
Every where I look I see bubbles. Ok, I know I see them because I am looking for them. I know the psychology. But, it is still fun and fascinating in many cases such as the Hubble Bubble.
“The Copernican principle holds that humans are not privileged observers of the Universe. Copernicus stated that the Earth is not at the center of the solar system or at any particularly special position in the heavens. Modern cosmology has extended this idea to reason that the earth does not occupy any unique position in the Universe. Modern philosophy of science pushes the principle even further to conclude that every observer (even if they be they little green men) should reason as if they were the most standard observer. However, despite all these humble and rational thoughts it is still tempting to explain certain aspects of modern cosmology that seem finely tuned as consequences of observer selection effects. Namely I am speaking of dark energy or the accelerated cosmological expansion which supposedly could be explained if we occupy a privileged position near the center of a large, nonlinear, and nearly spherical void in mass density. The idea that the region of the cosmos around us could be a void is colloquially known in astronomy as the Hubble bubble.” Read full article please
July 26, 2010 § Leave a comment
The race is on, or continuing between the LHC and the Tevatron. Regular readers know of my passion for particle physics. I find the work they are doing at the accelerators endlessly fascinating. Will they find this Higgs? Personally I don’t think so. Can I back that up with a reasoned argument? Nope. But, there are some very brilliant theoretical physicists who can. My point, I don’t have a horse in this race. I am watching it for the beauty of the game. It is beautiful.
“Steve Myers, CERN’s Director for Accelerators and Technology, presented the LHC schedule for the next 10 years today in the first plenary presentation at the International Conference on High Energy Physics. Myers also presented his predictions for the amount of data that the LHC may collect over the same time period. These predictions over the next few years will be scrutinized closely by scientists at Fermilab’s Tevatron, who have proposed extending the accelerator’s life for a further 3 years.” Read full Story»