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sound waves travel through air; waves on the sea travel through water; what do light waves travel through?
jtbell said:Place a single electric charge in a vacuum. It has a stationary electric field around it, given by Coulomb's Law. Now shake the charge back and forth. The electric field at each point in the vacuum starts to change; it oscillates. !
xAxis said:Does it mean that when I for instance turn on the light in my room, I generate the oscilating source of electric field which fills the universe?
Do you mean physycaly shake the charge?
Question--can we say that the "medium" the light waves move through = "the vacuum", as an analogy to the OP question about air and water ?jtbell said:Light waves are waves of electric and magnetic fields, which don't require a material medium. Electric and magnetic fields can exist in a vacuum, so light waves can, too.
Why not call it aether and be done with it?:zzz:Rade said:Question--can we say that the "medium" the light waves move through = "the vacuum", as an analogy to the OP question about air and water ?
No.Rade said:Question--can we say that the "medium" the light waves move through = "the vacuum", as an analogy to the OP question about air and water ?
xAxis said:is it posible to analogously explain the oscillation of EM field? What periodicaly changes in such oscilation?
Repertoire said:sound waves travel through air; waves on the sea travel through water; what do light waves travel through?
jtbell said:The magnitude and direction of the electric and magetic fields oscillates, at each point in the wave. We can detect this by putting an electric charge at the point in question. .
jtbell said:...The charge experiences an oscillating electric force. .
redlokki said:...There is a view which takes EM propagation to be harmonic motion, like connected pendulums.
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redlokki said:...A field, however, is a generally taken to be a volume with some directional or motion preference, and is visualized as a vector field. As such, a field doesn't move as a wave does. Or put another way, a wave is a small element of a field which has 'escaped' to travel outward in a straight line.
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I suppose that wave was created by a small element whic oscilated in that field (which was statical electromagnetic field??) So it, being a wave, carries the energy, and EM oscilations in a strait line (forget relativity for now) leave the initial field?redlokki said:...A field, however, is a generally taken to be a volume with some directional or motion preference, and is visualized as a vector field. As such, a field doesn't move as a wave does. Or put another way, a wave is a small element of a field which has 'escaped' to travel outward in a straight line.
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Space. Or spacetime if you prefer. This can be "electrified" and "magnetized", so while it's empty it isn't the same as nothingness.Repertoire said:sound waves travel through air; waves on the sea travel through water; what do light waves travel through?
xAxis said:jtbell said:The magnitude and direction of the electric and magetic fields oscillates, at each point in the wave. We can detect this by putting an electric charge at the point in question.
At which point?
jtbell said:...The charge experiences an oscillating electric force.
Where does this oscilations come from?
Whenever an object is electrified It generates electric ( and magnetic field) which is a vector field? But only when it starts wigling, it produces EM wave, right?
Rade said:Question--can we say that the "medium" the light waves move through = "the vacuum", as an analogy to the OP question about air and water ?
cesiumfrog said:Why not call it aether and be done with it?
DaveC426913 said:No.
Ok, so from this confused set of answers to my question, is it yes or no (please explain)---can we say the medium that light waves move through = "the vacuum", which then = "the aether". That is, is the vacuum = the aether ?rbj said:light waves (as well as other electromagnetic waves) travel through this medium called "aether" that permeates all of space in the entire universe. an observer that is not moving through this aether would measure the speed of light to be the nominal value of 299792458 m/s...
I think we can't. There is no such thing like an eather, (at least not in the form classical physicist would propose).Rade said:Ok, so from this confused set of answers to my question, is it yes or no (please explain)---can we say the medium that light waves move through = "the vacuum", which then = "the aether". That is, is the vacuum = the aether ?
Rade said:is the vacuum = the aether ?
Rade said:Ok, so from this confused set of answers to my question, is it yes or no (please explain)---can we say the medium that light waves move through = "the vacuum", which then = "the aether". That is, is the vacuum = the aether ?
The medium through which light waves travel is called the "electromagnetic spectrum." This encompasses all forms of electromagnetic radiation, including visible light, radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays.
Yes, light waves are able to travel through a vacuum. In fact, they are one of the few types of electromagnetic radiation that can travel through a vacuum, as they do not require a medium to propagate.
Yes, light waves travel at a constant speed of approximately 299,792,458 meters per second, which is the speed of light in a vacuum. This speed is a fundamental constant in physics, denoted by the symbol "c."
When light waves encounter a new medium, they can either be transmitted, reflected, or absorbed. The behavior of light waves in a new medium depends on the properties of that medium, such as its density and refractive index.
No, light waves cannot travel through all materials. Some materials, such as opaque objects, do not allow light to pass through them. This is because the atoms in these materials absorb and scatter the light, preventing it from passing through.