originally posted by: Nochzwei
EM field is an entity on its own, so how can it be connected to itself.
originally posted by: ImaFungi
The answer is because the EM field is connected to itself.
Its like saying I am connected to myself, how can that be.
Well, I dont really know the answer, but I thought I felt it out, but now I am left wondering in the same guise as the OP in this sense; Think about
standing in front of a mirror, and perhaps there is a light overhead; Electrons are not being shot out of the bulb, light is created by vibrating the
electrons, the EM field already exists everywhere, the electrons being shaken are just shaking the EM field, like when a bunch of people grab the ends
of a big flag and wave it up and down. So light, EM radiation, is the electrons shaking the field, space, between the bulb and the mirror, which when
the electrons in the mirror are disturbed by the Field they are coupled to being shaken, they start shaking too,...Well, I suppose first the light
from overhead, bounces off the electrons in your face, and then they transmit the molecular 3d expression of your face through space, the details and
information of which are translated now into the details in EM wave, which then hit the mirror, and due to the nature of this particle matter,
molecular configuration, the material of the mirror, naturally, transmits the signal back away back through space to your eyes.
Where I understand the OPs concern, though it is simply said in physics that light, em radiation, cannot interact with itself, and it is self
referentially explained, coming down to an answer of 'because', because its classified as a certain particle which infinite numbers of them can
exist in the exact same space. But there must be a physical reason as to why and how this is possible.
Anyway. I guess the answer might have to do something about the tremendous speed of light, and the extremely relatively close proximity in which
these situations are taking place, that of a person standing right in front of their mirror. If they hold an object in front of their face, then we
can see the sort of disruption that takes place, the light can no longer bounce off their face and hit the mirror....in their frame of reference...but
it is possible someone looking at a different angle can see their face. interesting and confusing topic, wish I knew why exactly and really light
cannot collide with itself, what that physically means.
If light is reflecting off your face to the mirror, and off the mirror to your face, in a very near continuous stream at the same time, why do they
not cancel out? there is only so much surface area of the mirror and your face, and a small bulb with an amount of shaking electrons 'lights up the
whole room', which requires light to reflect off of every item that you are able to see, and go back into your eye, seemingly continuously.
Maybe it has something to do with the roundedness of eye balls...
Something I wondered about once, is how at night a relatively strong flashlight pointed into the sky, you can see the beam of the light. That means
the electrons are shaking in the light, the EM field is being disturbed upwards and away, and at each point of that beam you are seeing, the EM field
is disturbing the air molecules there, which happen to enough times, reflect the disturbance in the field, your way.. now is it really reflecting it
in all ways, yes, I must suppose, as people standing all around the flashlight holder can see the beam.
But that means, that the true nature of the EM field shaking, is that it is not only shaking in that beam, it is shaking all around the beam, because
it has to be, in order to get to your eye, your eye doesnt leave your face and touch the beam, the wave leaves that area, and comes to you, and is
going all around. So that is the lessen that, the perhaps obvious lesson that, one can only see what enters their eye, though this doesnt mean that
the means in which one uses to see, 'shaking em field', is not occurring elsewhere.. I suppose this has to do with the planes and polarities of EM
radiation, which I have tried to question the ATS Physics knowers about, to no avail.