originally posted by: ImaFungi
originally posted by: mbkennel
No. If it were, you could have sound in space, which you don't.
This was answered to me asking if the medium air or sound exists on is also the gravity medium. Me wondering if gravity is the cause of the creation
of the atmospheric medium that allows sound to take place? Though Im quite sure gasses exist and form as sort of gasses regions in space away from
solids...maybe? So there can theoretically be an atmosphere just floating, and sound would behave in (not to the same degree, but) in the same way as
it does in our atmosphere?
Yes. Whoever connected gravity to sound was misleading you, or you didn't understand it.
The majority of my questioning this topic, is wanting to know in what way the EM field exists in free space, to better understand why its wave is such
a weird wave.
If you admit the EM field, the medium which the electron can non locally disturb (as you can non locally disturb a tennis ball at the far end of your
pool by splashing where you are), exists throughout space, then you are admitting that the 'self propagating wave', is either a very very very weird
(not like confused double slit observer weird unintuitive quantum mechanic things) mechanical thing, like how is that explained that at every area of
space exists these 2 switches, which if provoked will carry out an automatic zipper type action, or snaps, or magnets, like dominoes. This is the
mechanics aspect of quantum mechanics is it not.
No, it's the mechanics part of classical mechanics.
No. Propagating fluctuations in space-time metric are gravitational waves.
How does the EM field and gravity field exist in relation to one another, next to each other at all points in space? Entwined? Or holographically
For the the most part the cross interaction is nearly zero, except that gravity changes the underlying geometry of space time upon which the rest of
all physical processes in standard model, quarks, leptons, and weak & EM fields work on.
No. Sound waves in fluids are that way because you can't shear/torque (conventional) fluids in interesting ways, only the bouncy-bouncy does anything.
Sound waves in solids can have all sorts of interesting polarizations depending on the specific properties of the material, and this is very important
Hm ok, those polarizations have to do with the inherent movements of the atoms and electrons of the material, which at each point of the solid, would
either give and take, 'messing the original wave up'. What you mean about the intriguing nature of light polarization is the EM field is so pure that
it itself as a medium does not 'mess up the original wave'.
Yes, exactly. Electromagnetism is hence 'linear' in the sense of linear differential equations, and therefore waves don't interact with one another
in the absence of charges.
[uqote]So when EM radiation is created why doesnt the other area of EM fields locally to that self propagating wave react to it? This is because, oh
and this is why you say light doesnt mess with light, because EM fields cant effect EM fields? A magnetic field cannot create more magnetic field,
even though magnetic field, as EM field exists everywhere? A magnetic or electric field cannot make the EM field wave.
Read about the Maxwell equations. Gradeints in space in time of one field create changes in another, but propagating waves (which are combinations of
E & B) don't interact with one another.
Start with a charge. Moving it makes the E field that it was previously emitting look different, and moving charge makes B field. But past that
point the wave is propagating solely because changes in E create B and changes in B create E and there's self-consistent solutions which take into
account space and time derviatives correctly, and you don't need charges once you get them started, and that's called light.
Now is there a good reason why that doesnt happen? Could it be that 'where there is not self propagating EM wave', the EM medium acts like a solid,
in that it is entirely 'stable' and secure, so the relatively 'tiny' areas when compared to the greater EM field, are being 'smothered out' by the
totality of surrounding EM field, so the EM wave, cannot escape north or south or dampen or leak into the surrounding space, because the surrounding
space (that is the space perpendicular to its propagation) is 'keeping it in check', is this a proper way to look at why it has the properties it
I have a feeling you will respond, No. Its just a self propagating wave. The electric field creates a magnetic field, the magnetic field creates an
You are correct. EM fields appear to be fundamental in Nature with no deeper explanation or underlying material medium.
It had to do with the trials, being separate. And how the EM field is organized in such a way as to allow, according to direction of electron
acceleration, EM waves in all conceivable directions.
I was wondering on the two trials you would observe radiation but the waves would be oppositely polarized, if i understand the terms and concepts
correctly (if even superficially..I know I know, thats the problem) the 'up and down' and the 'side to side' would yield opposite polarity?
Hard to say about opposite, but yes. If you have 'polarized glasses' meaning that it is a filter which accepts only linearly polarized light in one
direction, if you turn it by 90 degrees, then all "up & down" polarized light will be blocked and only side-to-side polarized light will go through.
Think about sines and cosines, they are complementary, but the angle of (linear) polarization is all possible angles.
what occurs to the EM field if at the same time, these trials were to occur, with decreasing distance amongst the 2 test electrons with each
try? Do you see I am wondering how the EM field exist before the electron is accelerated, and then how it locally reacts to two electrons in
oppositely polarized acceleration? So there is enough EM field packed in there, so that even very close the field can wave 'both ways' at the same
time, in close proximity, and they have no affect on one another immediately at the local point of electron acceleration?
Are you asking about 'self energy' and self acceleration of classical charged particles reacting with radiation they themselves cause and their
self-energy? Well this was a problem with classical electrodynamics that there were some inconsistencies when you try to reconcile it with actual
particles, eventually solved with QM.
I posted this picture in another reply above, but am wondering if it is even a distant analogy to what is meant by 'at rest has radial field
surrounding it, 'vector pointing in' (though you say by convention makes me think there is nothing inward about it? Would the gravity vector around a
massive body also be pointing in?) cdn.themetapicture.com...
edit on 3-5-2014 by mbkennel because: (no reason given)
edit on 3-5-2014 by mbkennel because: (no reason given)