So sometimes a photon or sometimes the electromagnetic field can propagate from one place to another, and we call it a photon. It can happen to normal photons, and it can happen to these kind of temporary wibbly wobbly photons. It can turn into say an electron and a positron. In particular the electromagnetic field which is what we are talking about right now.Īnd we know that photons, that light, can turn into particle, anti-particle pairs. So actually the vacuum is kind of boiling with these fields. Wang (University of Massachusetts, Amherst), and S. There’s nothing stopping it from just bloop bloop bloop you know bubbling around.Ĭredit: NASA, ESA, Q.D. But even though it’s in that lowest energy state, even though maybe on average there is nothing there. The vacuum is just where this field is in its lowest energy state. A vacuum isn’t the absence of everything. In fact all the time space is kind of wibbling/wabbling around this field even in a vacuum. And this field can wibble and wabble around, and sometimes these wibbles and wabbles are like waves that propagate forward, and we call these waves photons or electromagnetic radiation, but sometimes it can just sit there and you know bloop bloop bloop, just you know pop fizzle in and out, or up and down, and kind of boil a little all on its own.
In our current view of how the universe works all of space and time is filled up with this kind of background field. To get the concept of virtual particles you actually have to take a step back and think about the field, especially the electromagnetic field.
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