Photon as a particle and e-ray and o-ray

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Discussion Overview

The discussion revolves around the behavior of polarized light, specifically the interaction of 45-degree linearly polarized light with birefringent materials, leading to the emergence of ordinary (o-ray) and extraordinary (e-ray) photons. The conversation touches on the classical and quantum mechanical interpretations of light as both rays and particles.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants suggest that a 45-degree linearly polarized photon can be thought of as splitting into o-ray and e-ray components when interacting with birefringent materials.
  • Others argue that the photon, as a particle, cannot be split, and instead, it will rotate to either vertical or horizontal polarization upon interaction with a polarizer.
  • One participant introduces the concept of superposition, stating that a photon polarized at 45 degrees exists in a superposition of 0-degree and 90-degree states, collapsing into one of these states with a 50% probability when passing through a polarizer.
  • Another participant mentions that the classical description of light as rays is an emergent behavior that reflects average outcomes rather than the underlying quantum mechanics.

Areas of Agreement / Disagreement

Participants express differing views on the nature of photons and their behavior when polarized. There is no consensus on whether the photon can be considered to split or if it simply rotates to a different polarization state.

Contextual Notes

The discussion highlights the interplay between classical and quantum models of light, with participants acknowledging the complexities and nuances involved in understanding polarization and birefringence.

galvin452
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Wiki in birefringence says, "light with linear polarizations parallel and perpendicular ... the component with polarization perpendicular to this axis will be refracted as per the standard law of refraction, while the complementary polarization component will refract at a nonstandard angle determined by the angle of entry and the birefringence. The light will therefore split into two linearly polarized beams, known as ordinary and extraordinary.

My understanding is that if I have a 45 degree linear polarized light (polarized photon particles?) I still end up with an o-ray photon and an e-ray photon.

But as a particle a photon can not be split so I would assume the 45 degree linear polarized photon would either rotate to the vertical or horizontal linear polarization.

Is this correct?
 
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galvin452 said:
My understanding is that if I have a 45 degree linear polarized light (polarized photon particles?) I still end up with an o-ray photon and an e-ray photon.

But as a particle a photon can not be split so I would assume the 45 degree linear polarized photon would either rotate to the vertical or horizontal linear polarization.

Is this correct?
You are mixing up models that are not meant to be mixed.
The "ray" description is classical, the photon description is quantum mechanics.
The classical effect is an emergent behavior what happens on average.
 
galvin452 said:
But as a particle a photon can not be split so I would assume the 45 degree linear polarized photon would either rotate to the vertical or horizontal linear polarization.

Is this correct?

A photon polarized at a 45 degree angle is in a superposition of being in of the 0 degree and 90 degree states. When it hits the polarizer, it will collapse it into one of the states, which each having 50% probability. So half of the photons will be ordinary and the other half will be extraordinary, recovering the classical expectations for the experiment.
 
wotanub said:
A photon polarized at a 45 degree angle is in a superposition of being in of the 0 degree and 90 degree states. When it hits the polarizer, it will collapse it into one of the states, which each having 50% probability. So half of the photons will be ordinary and the other half will be extraordinary, recovering the classical expectations for the experiment.

Thanks
 

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