Electromagnetic wave in two media

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SUMMARY

Electromagnetic (EM) waves exhibit refraction when transitioning between two media, as described by Snell's law. When an EM wave travels along the boundary of two different media, it can exhibit varying speeds at different points along its amplitude, leading to the separation of the wave into distinct strands. This phenomenon is akin to a column of soldiers splitting into two formations. Additionally, transient effects such as interference and evanescent "dragging" occur within the media, which are thoroughly analyzed in graduate-level optics courses focusing on fiber optic behavior.

PREREQUISITES
  • Understanding of Snell's law in optics
  • Basic knowledge of electromagnetic wave properties
  • Familiarity with wave interference concepts
  • Introduction to fiber optics and its principles
NEXT STEPS
  • Study the principles of Snell's law in detail
  • Explore the behavior of electromagnetic waves at media boundaries
  • Investigate wave interference patterns in optics
  • Learn about fiber optic technology and its applications
USEFUL FOR

Students and professionals in physics, optical engineering, and telecommunications, particularly those interested in the behavior of electromagnetic waves and fiber optics.

The Flobjka
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So if an EM waves travels from one medium to the other, it refracts depending on Snell's law. But what happens when it doesn't travel from one to the other, but goes right along the boundary so that one end of the amplitude is in each medium? As the wave "waved", would it have different speeds at different points in the wave? Is it even possible?
 
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The wave will separate into two strands ... just like a column of soldiers with one file on the rode, and the other in the mud.

There are other, transient effects inside of the media - some related to interference, some due to evanescent "dragging". You will find a very complete analysis when you study fiber optic behavior in a graduate level optics course.
 
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