Ρεύμα μετατόπισης: Διαφορά μεταξύ των αναθεωρήσεων
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→History and interpretation: a 'changing magnetic field' |
→History and interpretation: generality |
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Γραμμή 59:
Using the concept of electrical displacement, Maxwell concluded, using Newton's equation for the speed of sound (equation 132), that light consists of transverse undulations in the same medium that is the cause of electric and magnetic phenomena.
It is now believed that displacement current does not exist as a real current (movement of charge). It is defined as a quantity proportional to the time derivative of the electric field, and it is deemed to be able to exist in pure vacuum. The present day concept of displacement current therefore simply refers to the fact that a changing electric field has an associated magnetic field.
== See also ==
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