EE 3320 Lecture : Notes 5
Document Summary
Maxwell"s equations show us that in a source-free region of free space ( magnetic field results in a non-zero time-varying1. )0 a time-varying circulation or curl of the electric field and that a time varying electric field results in a non-zero time-varying circulation of. One can imagine for instance an antenna where a circuit z d i or. Any wave can be represented by a function of both space and time. Wave motion occurs when a disturbance at one place and time is related to an effect at another place and at a later time. Waves carry energy and have a definite velocity. Starting with maxwell"s first equation we can take the curl of both sides to get. 1 one can see from these equations that a monotonically changing magnetic field would produce a constant curl value for the electric field and similarly for the other case. Using the vector identity (see notes 1) gives us.
