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chr0naut
Firstly, the EM radiation is a different thing than the charged particle. The EM radiation is, by very definition, mass-less. Because it is mass-less, it cannot exist at below the speed of light, it would simply 'evaporate out of reality' (don't get hung up on this, it is simply a metaphorical description). Similarly, to travel at the speed of light mandates that it MUST be mass-less.
The EM radiation itself is a self sustaining interaction between two fields (physically, at 90 degrees to each other). The electric field component induces a magnetic field component, which in turn induces an electric field and this cycle repeats very rapidly. At no stage does either field exist without the other, they overlap so that as the magnetic field approaches zero, the electric field approaches its maximum amplitude. At all stages, total energy is conserved and does not fluctuate except between states. In this way, they require no medium to propagate. They are totally self sufficient in each other.
ImaFungi
I know it is a different thing, but EM radiation does not exist without charged particles right, so it is said the EM field/Em radiation is coupled to charge particles, in a way that the acceleration of a charged particle causes the EM field to be detected/EM radiation to exist, which can in turn interract with charged particles. I wont get hung up about that, but its not digging into the situation, when I ask what causes it or why does the EM field automatically respond to accelerated charge particle at the speed of light, what kind of material reacts like that, how is it possible mechanically, principally?
The EM field itself is the medium. And according to science it exists everywhere...sounds like a medium to me.
What's Excalibur?
Bedlam
IIRC, the thing's quoted in Excalibur.
Thanks. "zarg" is what I needed, as I wasn't finding zog. Close, but apparently not close enough for search.
DenyObfuscation
reply to post by Arbitrageur
It might be zarg? Excalibur Briefing?
Bedlam
reply to post by ImaFungi
There is no medium, and one isn't required. Other than, of course, vacuum. It sounds like you're trying to envision something being there to 'wave' in the sense that sound makes air vibrate.
There's not. Early on, science couldn't get past that, and that's where you get 'aether' from. But all the way back to Maxwell, it started becoming obvious that "aether" didn't exist, and wasn't needed.
chr0naut
Light, when propagating through empty space between stars, exists without an accompanying charged particle. The thing that kicked off the light oscillation, setting its amplification and frequency, may have been a charged particle in a star, but the light itself is independent once produced.
Also, the photon should not really be considered a physical sphere as is often imagined. A photon is the minimum packet size that an EM oscillation can exist in. When dealing with very low EM energies (at the quantum scale) we can "count photons" because if the size were to drop below the minimum threshold, it could not exist and so we only see what does exist as discrete packets of light.
Similarly, the electron as a physical sphere is a confusing metaphor. Perhaps a closer one to the mathematical description is that it is an area of electrical charge (which also comes in quantized, or discrete, values).
The EM field itself is the medium. And according to science it exists everywhere...sounds like a medium to me.
Electromagnetiic fields (also called charge) are very local. They aren't everywhere.
No mary you are what the site from NASA is is there open disclosure your seeing raw research materials posted by actual scientist. Often times in raw research they have scalar mentioned usually when studying plasmas like the sun. So a scientist could get the bright ides to say scalar wave propagation in a solar medium. What he means is hes discussing wave propagation in a solar medium and this is his scalar data. just for an example.Doesnt mean he thinks there are scalar waves. Then someone with no clue finds this it ends up posted on scribe and hundreds of other websites as proof for some theory there trying to sell you.
dragonridr
Okay so NASA is a part of the scam and NASA is all confused, too.
Ive seen it several times in research they say scalar wave equation. it doesnt mean the waves are scalar because to have a wave they become vectors.This is only as complicated as you want it to be.
ImaFungi
reply to post by dragonridr
I am wondering how the EM field physical exists and appears,( to be clear. Everything that exists exists in some way...though we cannot detect or see things for reasons including our technological inability, or circumstantial impossibility, does not mean they are not there or exist in exactly the way they exist, which is a way we cannot directly observe and know), IF we could know and see and observe exactly how the EM field exists, what would be seeing and observing, how does it exist, what is it, how is it? Next, same questions for electrons. And then, step by step, planck length and planck second to planck length and planck second, what does the physical action appear as when an electron is vibrated and EM radiation is created. This is what I want to know. Also I want to know why EM radiation or the EM field cannot interact with itself. And then lastly I guess is what you attempted to describe, which is the nature of magnetism and electricity, which is also extremely interesting, so according to what you answer to the above, how does electricity and magnetism tie into that world view, And how is the EM field 2 separate fields that are connected to each other?
Because the electron, and EM field and EM radiation are certainly said and seen to exist, and be items, and things, energetic reactions, and stuff. I am wondering if youve ever seen a simulation or video putting into image what the math tells the physicists the electron, the em field, and em radiation appear as. Because in reality, the numbers, the math, = objects and events. So if you understand the symbolic words of electron vibrate in em field creates em radiation, if you understand the numbers that represent that statement, cannot you or any physicist in the world who knows this, not plug those words and numbers, into a simulation which represents the physical universe, that those words and numbers are taken from and suppose to equally represent?
dragonridr
To answer another question here is a good time EM fields are always at right angles of the direction of the particle. they dont form a bubble or a sphere its a direction of force.
ImaFungi
dragonridr
To answer another question here is a good time EM fields are always at right angles of the direction of the particle. they dont form a bubble or a sphere its a direction of force.
By EM field here do you mean EM radiation? So say an electron is traveling some arbitrary direction at an arbitrary speed ------------------- and then it is accelerated (this is what causes EM radiation right?). So you are saying at the point of acceleration, EM radiation is caused to radiate away from the particle at 90 degree angles according to the altered direction, or speed of the particles new direction of travel? So when the particle is accelerated, firstly is the electron a 3-d object? Secondly, the EM radiation that is caused to radiate at right angles from the electron, is this 3-d radiation, and is there just one/two objects of radiation, if the particle is accelerated to a horizontal path for example, radiation string 1 going 90 degrees up, and radiation string 2 going 90 degrees down? So does the electron cause the em field that surrounds it, to have the most miniscule quanta of EM field, to interact from that point of acceleration, and that smallest quanta of em field is caused to do something by the accelerated electron, and what it is caused to do is called EM radiation? Which if the EM field is imagined to be a compressed 3d substance composed of intimately compressed electric and magnetic lines of force, which under relatively stable forms of electron travel, allows the local field to react in a stable manner, though when an electron is accelerated in this field, the electric and magnetic field lines which nearly infinitely exist everywhere, (and are connected from one end of the universe to the other?)they are caused to react in a manner that causes them to wave back and forth with each other, the nearest 2 lines of force to the accelerated electron, 90 degrees both ways, give and take one anothers energy indefinitely, and this is called a wave of EM radiation? And the reason the energy from this line of force interaction, if the EM field exists everywhere, (unless you are suggesting each electron only has 2 lines of force connected to it so that when it is accelerated those can be its EM radiation waves) doesnt leak into neighboring lines of force, causing a chain of reaction in directions other then 2 lines of force 90 degrees perpendicular to direction of travel is?
Also my last reply is very clear with what I wanted to know, please if you want to have a conversation with me, take the time to read my questions, they are very clear, In my last reply I made my intentions and inquisitions as clear and simply expressed as I possibly can and yet it still appears as if you did not read them at all.edit on 12-12-2013 by ImaFungi because: (no reason given)
ImaFungi
"The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction." - en.wikipedia.org...edit on 11-12-2013 by ImaFungi because: (no reason given)
chr0naut
ImaFungi
"The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction." - en.wikipedia.org...edit on 11-12-2013 by ImaFungi because: (no reason given)
The second sentence in that Wikipedia article refers to objects in the vicinty of the field. If the field were even, all pervasive and continued forever, without limit, then one could not describe any object as "in the vicinity of the field" because all objects would be, and to exactly the same extent.
The confusion you may be having is with the word "indefinitely". You are taking it to mean "infinitely". The word actually means "undefined". Thus the sentence is saying "I can't tell you how far the field reaches, because it is too variable and complex for me to explain".