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re: Einstein's general relativity theory is questioned but still stands for now
Posted on 7/31/19 at 9:45 pm to Commander Data
Posted on 7/31/19 at 9:45 pm to Commander Data
quote:
So why would any scientist "hope" that GR doesn't apply in extreme gravity wells?
I personally think they’re hoping that there’s more to classical physics than GR. That Einstein missed something. I think they’re in for a big disappointment.
There’s just no reason to think that String Theory isn’t the bridge between classical physics and the quantum world. Our only hope of understanding the latter is to discover how quantum mechanics becomes classical physics in the macro world, so to speak.
quote:
Super massive black holes still warp spacetime just the same as a white dwarf, right?
Right, and just the same as anything with mass does. What makes black holes unique is their ability to contain even massless particles such as photons. If we can discover how it does that we may be able to understand what gravity is.
This post was edited on 7/31/19 at 9:48 pm
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Posted on 7/31/19 at 9:52 pm to Trumansfangs
quote:
The NG piece just seemed less disparaging.
True. Sorry if my dander gets up when someone disparages GR. I just think it defines the classical world of physics as well as we’ll ever be able to and we need to focus on the quantum world since the classical world is made up of it.
Posted on 8/1/19 at 7:19 am to Kentucker
quote:
In theory that’s already been done. String Theory meshes the two together very well. Of course, we don’t currently have a way to detect strings or their effects. However, most physicists accept ST and it seems to be only a matter of time before we’ll see applications of the theory.
So string theory isn't currently measurable or testable correct?
Posted on 8/1/19 at 2:48 pm to CivilTiger83
quote:
So string theory isn't currently measurable or testable correct?
This is too long to quote, so I'll post this old link here :
Scientists find a practicle test for string theory
Phys.Org 2014
Posted on 8/1/19 at 3:46 pm to Trumansfangs
quote:
String theory is infamous as an eloquent theoretical framework to understand all forces in the universe —- a so-called "theory of everything" —- that can't be tested with current instrumentation because the energy level and size scale to see the effects of string theory are too extreme.
A Planck length is 1.6 x 10^-35 meters (the number 16 preceded by 34 zeroes and a decimal point) — an incomprehensibly small scale that is implicated in various aspects of physics. A “string” is a one-dimensional particle that is a quintillion times smaller than the Planck length. We can hope to see the effect of strings, as in the experiment talked about in the link, but direct detection may never be possible.
Posted on 8/1/19 at 3:59 pm to Kentucker
I hope it is possible. Probably not in our lifetimes, but 50 years ago cell phones and apps like Skype would have been called science fiction.
Posted on 8/2/19 at 10:06 am to Trumansfangs
fun fact...
we know more about space than we know about how the human brain functions... If you want a good read try Michio Kaku's (astrophysicist, cosmologist) book on the human brain. It is pretty cool stuff. He is really good at communicating complex things down to a layman level.
we know more about space than we know about how the human brain functions... If you want a good read try Michio Kaku's (astrophysicist, cosmologist) book on the human brain. It is pretty cool stuff. He is really good at communicating complex things down to a layman level.
Posted on 8/2/19 at 4:10 pm to yatesdog38
He's a funny guy, but as a layman I'm pretty good at understanding complex things. 
Posted on 8/2/19 at 5:19 pm to yatesdog38
David Eagleman’s Brain and Behavior is a rich source of knowledge, too.
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