query: How do EM waves travel in a vacuum?
positive_passages.docid: 14043
positive_passages.text: Why don't electromagnetic waves require a medium?
negative_passages.docid: 152179
negative_passages.text: Electrics fields in Electromagnetic waves
negative_passages.docid: 338
negative_passages.text: How do moving charges produce magnetic fields?
negative_passages.docid: 72913
negative_passages.text: Why does a light wave fade as it travels through space?
negative_passages.docid: 114836
negative_passages.text: Electric and Magnetic field's phase difference shift in linearly polarized electromagnetic waves
negative_passages.docid: 97466
negative_passages.text: what is the relationship between the dynamical casimir effect and virtual particles?
negative_passages.docid: 144948
negative_passages.text: Why doesn't an electromagnetic wave violate conservation of energy?
negative_passages.docid: 74101
negative_passages.text: How is a vacuum able to propagate light?
negative_passages.docid: 67701
negative_passages.text: The energy of an electromagnetic wave
negative_passages.docid: 121762
negative_passages.text: Why do planets not radiate EM waves in their orbits?
negative_passages.docid: 83824
negative_passages.text: Are energy and momentum separable for EM waves
negative_passages.docid: 139857
negative_passages.text: Will stationary charge radiate E.M waves if observer is accelerating?
negative_passages.docid: 8786
negative_passages.text: Mechanism by which electric and magnetic fields interrelate
negative_passages.docid: 28177
negative_passages.text: What causes the permittivity and permeability of vacuum?
negative_passages.docid: 104703
negative_passages.text: Why do electromagnetic waves become weaker with distance?
negative_passages.docid: 37533
negative_passages.text: Emission of EM radiation from an electron
negative_passages.docid: 87954
negative_passages.text: Does AC current produce EM waves?