- #1
physics user1
So i know that magnetic field lines are closed, in an electromagnetc wave how can be these lines closed? i cannot picture this in my head
Em waves and magnetic field lines
- Thread starter physics user1
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AI Thread Summary
Magnetic field lines in electromagnetic waves are closed loops, which can be difficult to visualize. The discussion centers around understanding how these closed lines function within the context of an electromagnetic wave. A standard dipole antenna is referenced as a common example to illustrate the radiation pattern associated with these waves. The presence of the antenna is confirmed as central to the wave's structure. This explanation helps clarify the relationship between magnetic field lines and electromagnetic radiation.
- #2
Drakkith
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I believe they look something like the following:
- #3
physics user1
Thanks @Drakkith
- #4
cpxuvs
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Is an antenna in the middle?Drakkith said:I believe they look something like the following:
- #5
Drakkith
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cpxuvs said:
Yes there is. I believe that's the radiation pattern of a standard dipole antenna.
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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