Exploring the Constant Frequency of EM Waves

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Discussion Overview

The discussion centers on the behavior of electromagnetic (EM) waves as they transition between different media, specifically focusing on why the frequency of the waves remains constant during this process. The scope includes theoretical aspects of electromagnetism and boundary conditions related to wave propagation.

Discussion Character

  • Technical explanation

Main Points Raised

  • One participant questions the reason for the constancy of frequency when an EM wave moves from one medium to another.
  • Another participant suggests that the boundary conditions that the electric and magnetic fields must satisfy are the reason for the constant frequency.
  • A further contribution states that the perpendicular component of the electric displacement vector D must remain equal at the boundary at all times, implying that this continuity can only be maintained if the frequencies on both sides of the boundary are the same.

Areas of Agreement / Disagreement

Participants appear to agree on the explanation involving boundary conditions and the continuity of the electric displacement vector, but no consensus is reached on the broader implications or further details of the phenomenon.

Contextual Notes

The discussion does not address potential limitations or assumptions regarding the definitions of the boundary conditions or the nature of the media involved.

Swapnil
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I was wondering, when an EM wave goes from one medium to another why is it that the frequency remains constant?
 
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The perpendicular component of the electric displacement vector D, must be equal at the boundary AT ALL TIMES to preserve continuity - this is only possible if the frequency of the wave on both sides of the boundary is the same.

Claude.
 
Makes sense. Thanks! :cool:
 

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