I am trying to follow.
If a particle has mass because it interacts, then mass is not a property, but an effect? This would lead to saying that gravity is an effect of an effect, not a force. OK, that's as close to logical as the quantum world seems to allow. The problem is the next hours show that talks about measuring the force of gravity and suggesting it is weak in our universe because it overlaps with another universe. 😕
I know I am missing something besides my sanity:
If I am standing where there is very little gravity, and I am observing light traveling near very high gravity, my clock is running much faster. Would this not make the light appear to be moving slow when from it's perspective, every thing is normal? Then, If I were sitting on the rim of a black hole having a beer, and I look at light traveling outside the galaxy, my clock is moving slower than the lights clock, so would I not "see" it moving faster than the limit from my point of view?
It gives you the correct relativistic result for any arbitrary distribution of moving charges in space.
Liénard?Wiechert potential - Wikipedia, the free encyclopedia
Mass is a particle property which arises from the Higgs field. Electric charge is a particle property which arises from the electromagnetic field. 30 years ago as a postgrad student I could almost understand this stuff, but not now so don't press me too hard for clear explanations!tvrgeek said:
Suggestions that gravity is weak because it leaks into other dimensions etc. are speculative and should always be presented as such.
Possibly said by an instrumentalist? (in the philosophical sense, not the musical sense) Many modern physicists are instrumentalists - the only things which matter are readings on dials. I prefer realism - there really is stuff out there and we really can understand it (to a limited but growing extent).
Just finished reading "The Beginning of Infinity" by David Deutsch. Very interesting, although I disagree with his atheism. He is quite rude about much modern philosophy and 'arty' people, especially when they assume that science is as content-free as their thoughts are.
Just finished reading "The Beginning of Infinity" by David Deutsch. Very interesting, although I disagree with his atheism. He is quite rude about much modern philosophy and 'arty' people, especially when they assume that science is as content-free as their thoughts are.
Instrumentalists are anti-speculators. Deviation from instrumentalism inevitably means speculations. 😉
You remind me of this blogpost from a couple months ago (and yes, that's my comment):
Living LIGO: No "Faster Than Light" Neutrinos
If the quote you mean is for the V>c case, no. The cone is a fundamental property of our universe, which at the time of that paper was not fully appreciated.
The last paragraph was my favo
The last paragraph was my favo
I am sure from reading this thread that many here will know the answer to this . Did light travel at a different speed just after the first forming of atomic particles compared to now ? If so is light speed slightly changing as the universe expands ? Or is the the effect of gravity constant regardless ? Forgive this as it might be common knowledge , is the speed of light proportional to the mass of the the universe? Where is the missing antimatter ? I speculate that it is at infinity drawing the universe outwards ( no idea why , it just seems to make sense ) . I have always said infinity hasn't happened yet and that makes what I just said more possible .
I liked the answers about the need for clocks . If you get the chance go to Greenwich observatory and see Harrison No 1 to 4 chronometers . Too beautiful for words .
I liked the answers about the need for clocks . If you get the chance go to Greenwich observatory and see Harrison No 1 to 4 chronometers . Too beautiful for words .
Obviously, you've never tried to make a superconducting magnet. Success in building one of them puppies can indeed be.....speculative..
jn
Been there, done that. And YES, you are absolutely correct!!
To me, the gentleman giving the tour was unbelievable. An excellent speaker to the public. What impressed me was his knowledge of all clocks and Harrison's specifically. I had pointed to one clock, mentioned that the pendulum appeared to have a lot of motion, he instantly responded...it was the clock where Harrison put in cyclodal cheeks..man, he was good.
jn
Attachments
As far as I know the Greenwich observatory is free entry . It is very near the Olympic games site . There is also a fascinating tunnel under the Thames nearby . Visit our Ashmolean in Oxford . Around the corner you can see John Turners house . It is also the birth place of our Richard the lion heart ( the street ) . Opposite in the Randolf Hotel ,have coffee and sit where Inspector Morse sat .
I will make a deal . Anyone who gives me warning I will give them a tour . Love Cambridge also if asking . Slightly prefer it not least it has in addition fantastic brick buildings which Oxford may have lost or never had if ignoring the Victorian era . Cambridge is where our hi fi industry grew from .
Body scanners is Oxford and I work where the 23 Tesla magnet was made . At the time it was the record .
The Ashmolean Museum of Art & Archaeology
I will make a deal . Anyone who gives me warning I will give them a tour . Love Cambridge also if asking . Slightly prefer it not least it has in addition fantastic brick buildings which Oxford may have lost or never had if ignoring the Victorian era . Cambridge is where our hi fi industry grew from .
Body scanners is Oxford and I work where the 23 Tesla magnet was made . At the time it was the record .
The Ashmolean Museum of Art & Archaeology
I believe you are correct. But it doesn't matter, I would have paid to get in.
You do supers? Was the 23 a combo of Ti outer, Tin middle, and copper inner? Or was HTS involved?
ps. Might be in london in oct. I'll keep you in mind.
jn
In the Astronomical Observatory of Cordoba, we have the original "Annalen der Physik," especially those of 1905, and 1916.😀
Nice picture. Reminds me modern opamp. 😀
This is High End:
An externally hosted image should be here but it was not working when we last tested it.
Schematic:
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""You do supers? Was the 23 a combo of Ti outer, Tin middle, and copper inner? Or was HTS involved?
ps. Might be in london in oct. I'll keep you in mind.
jn ""
You know I was probably told and didn't listen . What got me was how effective little things are in making it work . I saw one guy everyday winding miles of foil around things . I was always dubious it mattered . Recently we went from about 1 foot of insulation over to bubble wrap with foil in our houses . The building regs say it is superior !
The most fascinating thing was the small heating elements used as switches on the cryogenic coils . By heating locally a circuit is opened as the resistance goes from nothing to almost nothing . It was enough to allow current in as it prefers the zero resistance part of the unheated coil . Once cooled the switch is closed and the current is virtually constant for goodness knows how long ( I never asked ) . The coil is a hoop effectively with two lead-out wires . There is no brake in the hoop as a switch , just heat .
The big danger was working in the pit . Nitrogen would accumulate . It was almost like the arrival of the Queen . The health and safety guys and monitoring . We never worked in the pit anyway . Working in the pit was health and safety rehearsal . I asked once why we had a pit ? Because we might need it one day . I used to have to work near it up a ladder when building coils . The drop down into it was 30 feet . No one seemed to see that as health and safety .
As far as I know the bosses were the originators of these devices 30 years ago . One of the few teams that left the university and became businessmen . This is a recent patent of the people . I live 4 miles away . SSL a major mixing desk company half way from me to Magnex ! My drinking pal John worked for them and scanners . We mostly talk Amcrons and similar ( strength more than sound ) .
SUPERCONDUCTING MAGNET SYSTEMS
Funny part is I partly got the job because I had been with Garrard . The boss was educated in electronics to help his father in Cyprus who was the Garrard importer . His words to me and scratching his head " Garrard , how strange "
I left in the end because it was too noisy .
I was trying to design a scanner with electromagnets . 1.5 Tesla and 10 minus 8 stability . I was hoping for someway to ignore the fluctuations ( 10 minus 5 ) . I was firmly told the ways they " are " made is expensive and that suited them fine . I think my boss was talking in general and not about that company . I wasn't serious , it scared them that I might be I think .
My job was building gradient coils and testing them on big versions of Amcron amplifiers .
One day lightning hit the factory . I was convinced one of the processes had gone wrong and it was the end .
I suggested a cryo coil to NASA , they talked as if I knew about it ( named the project ) and that will be used to protect the crew from radiation . I also said pipe them loads of TV . Going to Mars will be mostly boring . One of their guys helped me with rubber wheels for Garrard ( he has a 301 ) ! It was a very serious study . I suspect rubber seal problems with the shuttle made them experts ?
Off to bed now .
ps. Might be in london in oct. I'll keep you in mind.
jn ""
You know I was probably told and didn't listen . What got me was how effective little things are in making it work . I saw one guy everyday winding miles of foil around things . I was always dubious it mattered . Recently we went from about 1 foot of insulation over to bubble wrap with foil in our houses . The building regs say it is superior !
The most fascinating thing was the small heating elements used as switches on the cryogenic coils . By heating locally a circuit is opened as the resistance goes from nothing to almost nothing . It was enough to allow current in as it prefers the zero resistance part of the unheated coil . Once cooled the switch is closed and the current is virtually constant for goodness knows how long ( I never asked ) . The coil is a hoop effectively with two lead-out wires . There is no brake in the hoop as a switch , just heat .
The big danger was working in the pit . Nitrogen would accumulate . It was almost like the arrival of the Queen . The health and safety guys and monitoring . We never worked in the pit anyway . Working in the pit was health and safety rehearsal . I asked once why we had a pit ? Because we might need it one day . I used to have to work near it up a ladder when building coils . The drop down into it was 30 feet . No one seemed to see that as health and safety .
As far as I know the bosses were the originators of these devices 30 years ago . One of the few teams that left the university and became businessmen . This is a recent patent of the people . I live 4 miles away . SSL a major mixing desk company half way from me to Magnex ! My drinking pal John worked for them and scanners . We mostly talk Amcrons and similar ( strength more than sound ) .
SUPERCONDUCTING MAGNET SYSTEMS
Funny part is I partly got the job because I had been with Garrard . The boss was educated in electronics to help his father in Cyprus who was the Garrard importer . His words to me and scratching his head " Garrard , how strange "
I left in the end because it was too noisy .
I was trying to design a scanner with electromagnets . 1.5 Tesla and 10 minus 8 stability . I was hoping for someway to ignore the fluctuations ( 10 minus 5 ) . I was firmly told the ways they " are " made is expensive and that suited them fine . I think my boss was talking in general and not about that company . I wasn't serious , it scared them that I might be I think .
My job was building gradient coils and testing them on big versions of Amcron amplifiers .
One day lightning hit the factory . I was convinced one of the processes had gone wrong and it was the end .
I suggested a cryo coil to NASA , they talked as if I knew about it ( named the project ) and that will be used to protect the crew from radiation . I also said pipe them loads of TV . Going to Mars will be mostly boring . One of their guys helped me with rubber wheels for Garrard ( he has a 301 ) ! It was a very serious study . I suspect rubber seal problems with the shuttle made them experts ?
Off to bed now .
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You may be talking about thinks like this:
Gödel metric - Wikipedia, the free encyclopedia
These are way over me.(*)
I am an ordinary Joe as you say there.
The cone in Heaviside work was a logical extension to the “shock waves” investigated by Ernst Mach.
I knew it would make you feel better.😀 (why I have the feeling that he was "a bit" sarcastic there? 😉 When he refered to other's work, he always was naming them )
George
(*) Gödel is more obscure than Einstein to me, although both in a way were motivated by Mach’s principle:
[The] investigator must feel the need of... knowledge of the immediate connections, say, of the masses of the universe. There will hover before him as an ideal insight into the principles of the whole matter, from which accelerated and inertial motions will result in the same way.
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