Light can be slowed down to a walking pace and even stopped in a medium of hot rubidium vapour. If an electromagnet was placed in this medium and turned on would the popagation of the magnetic field be slowed down or stopped?
Alduccii2
Answered question
2022-07-16
Answer & Explanation
Jeroronryca
Beginner2022-07-17Added 13 answers
Virtual photons don't travel in the way commonly thought of for real photons - it's more that there is a probability of an electromagnetic interaction represented by a particle term in the perturbation theory. In Field theory they appear as disturbances in the field with a different symmetry to the real ones.
At a beginner level it is probably best to think of virtual particles as intermediate steps in a calculation.
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