- #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
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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.
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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:
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Drakkith
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cpxuvs said:
Yes there is. I believe that's the radiation pattern of a standard dipole antenna.
I am reading the Griffith, Electrodynamics book, 4th edition, Example 4.8. I want to understand some issues more correctly. It's a little bit difficult to understand now.
> Example 4.8. Suppose the entire region below the plane ##z=0## in Fig. 4.28 is filled with uniform linear dielectric material of susceptibility ##\chi_e##. Calculate the force on a point charge ##q## situated a distance ##d## above the origin.
In the page 196, in the first paragraph, the author argues as follows ...
Thank you for reading my post. I can understand why a change in magnetic flux through a conducting surface would induce an emf, but how does this work when inducing an emf through a coil? How does the flux through the empty space between the wires have an effect on the electrons in the wire itself?
In the image below is a coil with a magnetic field going through the space between the wires but not necessarily through the wires themselves.
Thank you.
Hello. My question is:
When a capacitor in LC circuit is out of charge (T/4) does that mean that all electrons left the capacitor or that there is the same quantity of electrons on both plates?
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