query: How electric field and magnetic field propagate through vacuum where there's no charge present?
positive_passages.docid: 32832
positive_passages.text: How do electromagnetic waves travel in a vacuum?
negative_passages.docid: 48013
negative_passages.text: What is the mechanism by which magnetic fields do work?
negative_passages.docid: 79853
negative_passages.text: Induced magnetic field produces electric field and vice versa forever!
negative_passages.docid: 147803
negative_passages.text: Why does vacuum have a nonzero characteristic impedance towards electromagnetic radiation?
negative_passages.docid: 155652
negative_passages.text: What are the calculations for Vacuum Energy?
negative_passages.docid: 58404
negative_passages.text: Does vacuum (empty space) exist?
negative_passages.docid: 35409
negative_passages.text: Massless charged particles
negative_passages.docid: 76340
negative_passages.text: If time-varying electric and magnetic fields originate each other, how come they are in phase?
negative_passages.docid: 78372
negative_passages.text: Work is not done by the magnetic field?
negative_passages.docid: 116627
negative_passages.text: Why doesn't a charged particle moving with constant velocity produce electromagnetic waves?
negative_passages.docid: 97128
negative_passages.text: Electromagnetic field of unpolarized light
negative_passages.docid: 7332
negative_passages.text: Is the double-slit experiment typically carried out in a vacuum?
negative_passages.docid: 127450
negative_passages.text: How can the electric potential be zero at a point where the electric field isn't, if that field can give a test charge kinetic energy?
negative_passages.docid: 155927
negative_passages.text: Force felt by a moving charge due to its own magnetic field?
negative_passages.docid: 14174
negative_passages.text: Why is the electric field inside a conductor zero in equilibrium?
negative_passages.docid: 85582
negative_passages.text: Why aren't all photons virtual particles even in the "vacuum" of empty space?
negative_passages.docid: 84650
negative_passages.text: Electric Field from charged sphere within another charged sphere does not reinforce?