Generating Electromagnetic Waves

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SUMMARY

Electromagnetic waves are generated by charged particles in motion, as described by Maxwell's equations. A permanent magnet does not directly produce electromagnetic waves; instead, it creates a magnetic field due to the spin of its electrons. To generate electromagnetic waves, one must accelerate charged particles, which can be achieved by moving a permanent magnet in a spring mass system. However, this method is inefficient and not commonly documented in literature.

PREREQUISITES
  • Understanding of Maxwell's equations
  • Knowledge of electromagnetic fields and waves
  • Familiarity with charged particles and their behavior
  • Basic principles of magnetism and magnetic fields
NEXT STEPS
  • Research the practical applications of electromagnetic wave generation
  • Study the relationship between charged particle acceleration and electromagnetic radiation
  • Explore the efficiency of various methods for generating electromagnetic waves
  • Investigate the role of pulsars in electromagnetic wave production
USEFUL FOR

Physicists, electrical engineers, students studying electromagnetism, and anyone interested in the principles of wave generation and magnetism.

Caio Ferrari
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Every book I ever read describes a electromagnetic wave as a phenomena generated by charged particles accelerating. This will produce a change in electric field that induces a magnetic field.
But, due to Maxwell equations a change in magnetic field will also produce an electric field. So, if a hold a permanent magnet bar into an spring mass system, does it will produce an electromagnetic wave?
 
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How does the permanent magnet generate its magnetic field? With charged electrons and their spin.
How do you change the magnetic field? By accelerating the object with its charges ;).

Moving a permanent magnet up and down should produce electromagnetic waves, probably with a terrible efficiency.
 
So, even a magnetic field is generated by a charged particles accelerated. That's ok.
It means that the only source of electromagnetic waves is a electric charge.

But I've never seen a book or even a example in which a wave is produced by a permanent magnet. Even a pulsar produces its waves because the electrons are being accelerated by a very strong magnetic field.
 

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