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Natural Science Forum / Physics / General Physics / July 2008Measuring gauss from pulsars
How do they measure gauss from distant stars like pulsars, or maybe it is just an estimation, if they can what kind of instrument is used? What is actually measured with a gaussmeter? If a magnetic field somehow would go through an instant collaps, would the absence of field make an immediate collaps to the magnetic flux, or will the magnetic flux keep on travel toward us just like radiowaves at the speed of light? My question probably a bit incoherent and use wrong terminology but i think you understand the core of the question. Is there remnissants of magnetic fields travel the universe with the speed of light or do they vanish with the source. Is there any experiment done where it is proven that magnetic fields travel with the speed of light. I basically wonder if there will be ways to see if distant novas in the sky still are there or if they already collapsed, could such a technique be developed or does Einsteins light postulate make it futile to even try? Is there any connection between magnetic fields and the inverse square law as in the case of gravity. Could an object magnetic field theoretically be so strong that it overwin gravitation, earth is a magnetic body? Could a theoretical object with a repelling magnetic field be strong enough to overwin the gravity? I hope that at least some of the questions make sense. On Jul 18, 4:14 am, jonas.thornv...@hotmail.com wrote: > How do they measure gauss from distant stars like pulsars, or maybe it > is just an estimation, if they can what kind of instrument is used? This is why you should read the literature. Zeeman splitting & spectroscopy is a reliable way to determine ambient fields. > What is actually measured with a gaussmeter? Magnetic flux. [...] > On Jul 18, 4:14 am, jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 9 lines] > > [...] Hello Eric! Thank you for your short but brief answer. How strong is the magnetic flux field outside earth electro magnetic field is the flux itself harmful? The other night i watched the start of Moobase Alpha and i found it utterly fascinating. Do the spacecrafts carry gaussmeter or other equipment to measure the local flux field, i read that a pulsar have an enormous flux field how do it propagate through space. I guess the inverse square law is not applicable to magnetic fields. How do you calculate the flux field strength from a pulsar "gauss?" outside earths shielding magnetic field. Is the spaceshuttles and spacestations within earths electro magnetic field? Besides the radiation, how do they shield the spacecrafts from fluxes in the electro magnetic surrounding "space?", or is it not necessary? What happen to a body if there is strong fluctuations in the magnetic fields would it cause sickness, at how many gauss will the body and cells get damaged? I am interested but know very little about magnetic fields, magnetic radiation and magnetic flux. > > On Jul 18, 4:14 am, jonas.thornv...@hotmail.com wrote: > > [quoted text clipped - 37 lines] > I am interested but know very little about magnetic fields, magnetic > radiation and magnetic flux. Terrestrial surface field is below 0.4 gauss and dropping. Refrigerator magnets are about 100 gauss. MRI tunnels are abut 10,000 gauss. Pulsars are around a billion gauss. The vacuum is estimated to break down around 1-10 trillion gauss. Electrons spiral around magnetic lines of force. Strong magnetic fields therefore elongate atoms. You don't want to be in fields beyond around 50 teslas lest your biochemistry go for a Burton.  SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/lajos.htm#a2 > jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 48 lines] > fields therefore elongate atoms. You don't want to be in fields > beyond around 50 teslas lest your biochemistry go for a Burton. How strong is the suns magnetic field using gauss, what formula should i use to calculate how it diminish with distance? Later you are talking about teslas, how does this unit relate to the measured gauss. > -- > Uncle Alhttp://www.mazepath.com/uncleal/ > (Toxic URL! Unsafe for children and most mammals)http://www.mazepath.com/uncleal/lajos.htm#a2- Dölj citerad text - > > - Visa citerad text - > > jonas.thornv...@hotmail.com wrote: > > [quoted text clipped - 54 lines] > Later you are talking about teslas, how does this unit relate to the > measured gauss. Screw your lazy ignorant a.s into a chair and google it. Ignorance is educable, stupidity is forever. SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/lajos.htm#a2 > jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 65 lines] > > - Visa citerad text - ;) maybe i will i saw a formula on wikipedia to calculate so i probably could. Meanwhile i give you something to ponder over, not that i think you know or can calculate the answer... If we somehow could align strong repelling magnets in a straight plast tube along a 300 000 km line in space. We then push the first one how long time would it take before our gaussmeter in the other end noticed a change in the flux? jonas.thornvall@hotmail.com wrote: > > jonas.thornv...@hotmail.com wrote: > > > > jonas.thornv...@hotmail.com wrote: > > > > > > On Jul 18, 4:14 am, jonas.thornv...@hotmail.com wrote: > Meanwhile i give you something to ponder over, not that i think you > know or can calculate the answer... You are edging into idiot territory > If we somehow could align strong repelling magnets in a straight > plast tube along a 300 000 km line in space. > > We then push the first one how long time would it take before our > gaussmeter in the other end noticed a change in the flux? Depends on the gaussmeter. distance/lightspeed - and you only need one magnet. With all the intervening mass, never. SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/lajos.htm#a2 > jonas.thornv...@hotmail.com wrote: > > >jonas.thornv...@hotmail.com wrote: [quoted text clipped - 13 lines] > Depends on the gaussmeter. distance/lightspeed - and you only need > one magnet. With all the intervening mass, never. Oh so now you say that a long enough bar magnet with accomany field, will not react to another field approaching. I am pretty sure that the field will response, what make you think that a line of interchanging fields act any differently, you can glue two repelling magnets and you have one field. > -- > Uncle Alhttp://www.mazepath.com/uncleal/ > (Toxic URL! Unsafe for children and most mammals)http://www.mazepath.com/uncleal/lajos.htm#a2 Uncle Al (of Irvine) Their fields are to far away,and obey the inverse square law . Best to stay here in our solar system with Sun and Jupiter. Like the Sun magnetic field strength is 2 gauss(645% of Earth ) Once you go outside our so0lar system you go into using approximation Go figure Bert On Jul 18, 5:53 am, jonas.thornv...@hotmail.com wrote: > > On Jul 18, 4:14 am, jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 15 lines] > How strong is the magnetic flux field outside earth electro magnetic > field is the flux itself harmful? Field is not flux. Flux is the integrated amount of field that passes through a given surface area. Magnetic flux can only do something useful when it changes. > The other night i watched the start of Moobase Alpha and i found it > utterly fascinating. [quoted text clipped - 5 lines] > strength from a pulsar "gauss?" outside earths shielding magnetic > field. Magnetic fields propagate through space the same way electric fields do in that they are simply there. A dipole field falls off as 1/r^3, which is far faster than gravity. > Is the spaceshuttles and spacestations within earths electro magnetic > field? Earth's magnetic field - depending how you measure - extends for many Earth radii in all directions. Some more than others, though. > Besides the radiation, how do they shield the spacecrafts from fluxes > in the electro magnetic surrounding "space?", or is it not necessary? You can shield it but why? The ambient field is weak, and does not change rapidly enough to harm anything. Except spacecraft during events that rapidly compress the field, but that's complicated. > What happen to a body if there is strong fluctuations in the magnetic > fields would it cause sickness, at how many gauss will the body and > cells get damaged? Strong fluctuations will induce current. A strong static field will 'encourage' anything with unpaired electrons to align, and fields that are strong enough will start to interact with the fantastically weak diamagnetic properties of water. At some point, I have no idea where, the field will disrupt the biochemistry by totally borking out the ion channels in your body. > I am interested but know very little about magnetic fields, magnetic > radiation and magnetic flux. Purchase a classical E&M textbook. > On Jul 18, 5:53 am, jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 22 lines] > surface area. > Magnetic flux can only do something useful when it changes. But a stationary barmagnet have both field and flux, where the flux is the strength at a certain distance over a certain area? But if i replace the cone on a speaker with a bar magnet and let it oscillate in 1200 hz, is that an oscillating flux or a magnetic field transmitter? Does such phenomenon exist in nature magnetic fields that oscillate, what about neutron stars? What could i use to measure pickup the oscillating flux would it be sufficient with an iron ring and copperthread linning? Would that be a primitive gausmeter? I would like to try to build an magnetic transmitter and receiver that work over a couple of meters. "For audio to start with" could you give me some advice or isn't it feasible? > > The other night i watched the start of Moobase Alpha and i found it > > utterly fascinating. [quoted text clipped - 41 lines] > > - Visa citerad text - On 18 Juli, 19:15, jonas.thornv...@hotmail.com wrote: > > On Jul 18, 5:53 am, jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 91 lines] > > - Visa citerad text - If we somehow could align strongly repelling magnets in a straight plast tube along a 300 000 km line in space. We then push the first one how long time would it take before our gaussmeter in the other end noticed a change in the flux? On Jul 18, 9:15 am, jonas.thornv...@hotmail.com wrote: > > On Jul 18, 5:53 am, jonas.thornv...@hotmail.com wrote: > [quoted text clipped - 25 lines] > But a stationary barmagnet have both field and flux, where the flux is > the strength at a certain distance over a certain area? Again - field is not flux. [...] |
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