as I understand it, electromagnetic waves have two contents which are the result of each other, i.e., when a moving electric charge creates a changing magnetic field at allude X climate a changing electric field is developed at allude Y and this repeating process is what creates EM waves, therefore therefore, it needs no medium.Is my expertise correct?

One thing that I"m surprised to understand is that light is additionally called an electromagnetic wave.

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Does this include light of any kind, because that example: irradiate from a bulb, a tube, and likewise from the Sun?How perform they save electric and magnetic fields?



Well, I would say the electromagnetic field is the medium.

For favor the tool water oscillates when a water wave is observable after throw a stone, so the electromagnetic field oscillates once excited by one antenna, say. If nothing oscillates there space no waves, neither in water no one in the electromagnetic field.

The tool disappears only when one think of one electromagnetic ar as being nothing, just a vacuum. But this liberal view of the vacuum is quite different from the watch of the vacuum in QED, the welcomed theory that electromagnetic fields. There the vacuum state doesn"t own an electromagnetic field. Much more precisely, its expectation worth - i.e., what is observable around it - is identically zero.


Yes friend are totally right, yet it take it an intellectual change for physicists to realise that it made sense to have a wave that wasn"t the activity or jiggling of part physical medium, a tide that might exist equally fine in north space.

All light is electromagnetic radiation. However to questioning « how do castle contain ... » is a small vague or philosophical. The correct answer is, the irradiate is the field.

By the way, over there isn"t yes, really a difference in between the electrical field and the magnetic field, lock jointly create one electro-magnetic field, and this one field cannot really be separated into two different parts, one electric, the various other magnetic, due to the fact that two various observers that are moving in various directions would certainly divide the same ar differently, what one called electric, the other observer would contact magnetic, mirroring that the division into two components is somewhat artificial.

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Finally, to answer probably what you really meant, just how does the light pear or whatever contain the field, the answer is it doesn"t specifically at first, but transforming on the current of electrical energy that flows with the filament produces movements in the electron in the atoms in the filament at just the ideal speeds so the that movement of the electricity in the atoms generates a magnetic field and also that starts the whole process. In its fundamental principle, that is the same just like a radio antenna, however the frequency the the activity is different so the electro-magnetic field created is at a radio frequency rather of a light frequency, and also there are other differences of information also. I will certainly not explain around how atom emit photons since that, in a way, is already contained in what ns said, I just said it in the wave snapshot of timeless electromagnetic theory rather of in quantum terms.