Photon Polarization: Explained

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    Photon Polarization
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Discussion Overview

The discussion revolves around the concept of photon polarization, exploring its basis and implications within the framework of physics. Participants address both the fundamental principles and the characteristics of photon behavior in relation to polarization.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant requests an explanation of the basis of photon polarization.
  • Another participant suggests consulting physics textbooks, stating that electromagnetic waves are transverse and thus have two polarization states.
  • A different participant explains that photons are generated by the movement of charges, indicating that linear polarization occurs when a charge moves up and down, while circular polarization results from a charge spinning, with two possible orientations (CW or CCW).
  • Another participant introduces the concept of "helicity operator eigenvalues" to explain why photons have two polarization states instead of three, referencing "gauge invariance" and noting the tension between the terms "polarization" and "photon."

Areas of Agreement / Disagreement

Participants present various perspectives on photon polarization, with no clear consensus reached. Some explanations focus on classical interpretations, while others delve into more advanced concepts, indicating a range of understanding and approaches.

Contextual Notes

The discussion includes references to foundational physics concepts, but lacks detailed exploration of the underlying assumptions and definitions related to polarization and photon behavior.

preet0283
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can some one explain 2 me the basis of photon polarization ...?
 
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See any freshman physics book, or one more advanced, to learn that electromagnetic waves are transverse, and that does it --transverse => two polarization states. Very basic stuff.
Regards,
Reilly Atkinson
 
preet0283 said:
can some one explain 2 me the basis of photon polarization ...?

Photons are "generated" when a charge moves in a specific way. If
the charge moves up and down, the photons that fly off will be polarized
linearly.

If the charge spins around, they will be polarized circularly and one of two
ways depending on which way it spins, CW or CCW.
 
It's called "helicity operator eigenvalues". Why the photon has two instead of 3, well, it's called "gauge invariance". "Photon polarization" is a bit of an oxymoron, as "polarization" is typical to wavelike phenomena, while "photon" is a particle.

Daniel.
 

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