Possible to adjust light with magnetic field?

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Discussion Overview

The discussion revolves around the interaction between light and magnetic fields, specifically whether a magnetic field can alter the wavelength of light. Participants explore concepts related to the Faraday effect and the potential for changing light properties through magnetic influences.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions if changing a magnetic field could alter the wavelength of light, suggesting a relationship between the electric and magnetic components of light waves.
  • Another participant references the Faraday effect, indicating that it is a known phenomenon related to the interaction of light and magnetic fields.
  • A subsequent post suggests the possibility of using a Faraday rotation device to change a red beam of light to infrared, which is challenged by another participant.
  • It is asserted that the Faraday effect changes the angle of polarization rather than the frequency of light.
  • A participant inquires if it is possible to change the wavelength of the magnetic field itself to affect the wavelength of light passing through it, rather than just its polarization.
  • Another response states that altering the wavelength of light through a magnetic field would only be achievable with the introduction of gravity, noting that this would be observer-dependent and temporary.

Areas of Agreement / Disagreement

Participants express differing views on whether a magnetic field can change the wavelength of light, with some asserting that only polarization is affected, while others explore the theoretical implications of changing magnetic field properties.

Contextual Notes

The discussion includes assumptions about the nature of light and magnetic fields, as well as the limitations of the Faraday effect. The responses indicate a lack of consensus on the mechanisms involved and the conditions under which changes might occur.

Amalan
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Hey I am new to this forum, I've browsed around a few threads on here and found them to be quite insightful. I have a question for the physics gurus of this forum. To my understanding, light waves consists of an electric and magnetic field perpendicular to each other. If one constant were to change, would it then change the other constant? So if a beam of light were directed toward a magnetic field, is it possible to change the wave length of the beam?
 
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Amalan said:
Hey I am new to this forum, I've browsed around a few threads on here and found them to be quite insightful. I have a question for the physics gurus of this forum. To my understanding, light waves consists of an electric and magnetic field perpendicular to each other. If one constant were to change, would it then change the other constant? So if a beam of light were directed toward a magnetic field, is it possible to change the wave length of the beam?

Yes, it was discovered long ago by Faraday. See "the Faraday effect".
 
starthaus said:
Yes, it was discovered long ago by Faraday. See "the Faraday effect".

so it is possible to send a red beam of light through a faraday rotation device and have it come infrared on the other side?
 
Amalan said:
so it is possible to send a red beam of light through a faraday rotation device and have it come infrared on the other side?

No,the effect changes the angle of polarization wrt the magnetic field, not the frequency. Have you read the article?
 
starthaus said:
No,the effect changes the angle of polarization wrt the magnetic field, not the frequency. Have you read the article?

yeah is there a way to change the wavelength of the magnetic field to force any beam that would pass through it to change to the wavelength of said magnetic field and not just the polarization of it?
 
Amalan said:
yeah is there a way to change the wavelength of the magnetic field to force any beam that would pass through it to change to the wavelength of said magnetic field and not just the polarization of it?

No, you could accomplish this only with the introduction of gravity, and this would be observer-dependent and temporary.
 

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