Why Use Plane Waves to Solve Maxwell's Equations?

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SUMMARY

Plane waves serve as essential approximations in solving Maxwell's equations, particularly in scenarios where the observer is sufficiently distant from an oscillating dipole source. Despite their requirement to propagate infinitely, plane waves simplify complex wave behavior, allowing for practical applications in electromagnetic theory. Their utility lies in the ability to ignore wave curvature when analyzing small volumes of space relative to the distance from the source.

PREREQUISITES
  • Understanding of Maxwell's equations
  • Familiarity with electromagnetic wave propagation
  • Knowledge of dipole radiation theory
  • Basic concepts of wave approximation techniques
NEXT STEPS
  • Research the implications of using plane waves in electromagnetic simulations
  • Explore the limitations of plane wave approximations in real-world applications
  • Learn about the mathematical derivation of plane waves from Maxwell's equations
  • Investigate alternative wave solutions for complex geometries in electromagnetic theory
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Physicists, electrical engineers, and students studying electromagnetic theory who seek to understand the practical applications and limitations of plane wave approximations in solving Maxwell's equations.

girlinphysics
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When finding solutions to Maxwells equations we always cosider the case of a plane wave. But are plane waves real/physical solutions we can consider in real life? My guess is not because it is required to propagate infinitely.

So why do we use plane waves to solve Maxwell's equations?
 
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Plane waves are useful approximations for many practical situations. For example, if you are far enough from an oscillating dipole source, and you consider a volume of space that is small enough compared to the distance from the source, the curvature of the waves is small enough that you can ignore it for practical purposes.
 

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