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2

Yes, you are right. The four momentum of a virtual photon needn't to lie on the mass shell. Thus the zeroth component of the four momentum of a virtual photon is independent of its spatial components. The reason for this is that the zeroth component of the four momentum of a virtual photon arises from the Fourier transform of the step function. See S. ...


3

The term virtual is used in other places in physics. For example in virtual images in a a mirror : we see an object in great verisimilitude, even ourselves. Why is the image called virtual and not real? Because it has the optical properties of the imaged object but not a large number of other attributes, mass being the simplest. In addition, its existence ...


-1

When one of the particle pair travels away from the black hole it has positive momentum when viewed by an observer at infinity. Considering the conservation of momentum, the in-falling particle must have negative momentum, hence, energy, so the blackhole loses mass.


0

Your argument against is based on the fact that in one frame there is no magnetic field in one frame, but there is a magnetic field in a different frame. So there must be magnetic virtual particles in some frames but not in others. Hence magnetic virtual particles can't exist. However there aren't separate magnetic and electric virtual particles. There are ...


5

Virtual particles refer to actual, nonzero features in the quantum fields of real objects, but they are features that are not particles in many ways so you should not expect anything from their being named "particle". Basically, the idea of virtual particles was invented as a device for when you want to hold on to the particle picture while doing quantum ...


2

Virtual particles are not observable by definition. They represent "internal lines" in Feynman diagrams. For example, this diagram: Here two electrons move toward each other, interact, then move away from each other. The external lines represent "real" electrons which we can measure/observe. The internal line here is an excitation of the electromagnetic ...



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