Q.No.20: - what are virtual particles? Is their any relation between virtual particles and sea quarks?

Q.No.20: - what are virtual particles? Is their any relation between virtual particles and sea quarks?

Ans: -  virtual particles are created between(transit) all kind of interactions. The word "between" means that virtual particles are created during the interactions in others words they are created after the start of interactions and before the end of interactions.  Virtual particles do not necessarily carry the same mass as the corresponding real particle, although they always conserve energy and momentum. The longer the virtual particle exists, the closer its characteristics come to those of ordinary particles.
           In quantum field theory, even classical forces—such as the electromagnetic repulsion or attraction between two charges—can be thought of as due to the exchange of many virtual photons between the charges. Virtual photons are the exchange particle for the electromagnetic interaction. Sea quarks are also called the virtual particles.

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