bhobba's latest activity
-
bhobba reacted to PeterDonis's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with
Like.
Because they're using different definitions of ordinary language words. That's why we don't do physics using ordinary language. We do it... -
bhobba replied to the thread High School Is there anything in the Universe that is not fundamentally made up of matter?.Love it. My definition is 'Particles are excited states of an underlying physical field, often called field quanta'. If you want to...
-
bhobba reacted to PeroK's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
It seems to me a bit like saying all the people in the world are men, if we count women and children as part of "mankind".
-
bhobba reacted to PeroK's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
There is matter, antimatter, radiation, possibly dark matter, possibly dark energy, spacetime (if you count that as something)...
-
bhobba reacted to Borek's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
So helium-4 atom doesn't occupy space?
-
bhobba reacted to Hill's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
According to this definition, gravity and EM radiation are not matter.
-
bhobba reacted to martinbn's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
It depends on your definition of matter. If by matter you mean anything that can interact, then no, there isn't anything that isn't...
-
But they amount to unverifiable speculation.
-
bhobba reacted to Morbert's post in the thread Undergrad Sean Carroll's description of the Many Worlds interpretation with Like.
What's nice about DH is it's an interpretation of any quantum theory. I.e. any theory with a non-commutative algebra of observables...
-
bhobba reacted to A. Neumaier's post in the thread Undergrad Sean Carroll's description of the Many Worlds interpretation with Like.
I gave references in my paper here.
-
bhobba replied to the thread High School Interesting paper on QM in Scientific American.Von Neumann's famous writing on this in his classic text on QM never really caught on (and when I first read it, it left me scratching...
-
bhobba reacted to PeterDonis's post in the thread High School Interesting paper on QM in Scientific American with Like.
But then what is doing the observing? Ultimately, we would like QM to not even have such a divide--to be able to describe everything...
-
bhobba replied to the thread Undergrad Sean Carroll's description of the Many Worlds interpretation.Highly recommended, but very math-heavy. Fine for math nerds like me, but others may not enjoy it as much as I did. Thanks Bill
-
bhobba reacted to PeroK's post in the thread Undergrad Sean Carroll's description of the Many Worlds interpretation with Like.
In the MWI, the universe is the universal wave-function. The universe doesn't split into two universes, as there is still the one...
-
bhobba replied to the thread Undergrad Sean Carroll's description of the Many Worlds interpretation.I rather enjoy Sean's books. But Sean does not point out one important fact (I can link to an advanced paper on it, but at this level...