What Happens to a Photon When Light is Reflected?

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SUMMARY

The discussion centers on the behavior of photons during reflection, specifically addressing three views on the phenomenon. The consensus reached is that when light reflects off a surface, a photon is absorbed and another is emitted, confirming the second view as correct. This understanding aligns with Richard Feynman's principles outlined in 'QED', emphasizing the interaction between photons and surfaces rather than a simplistic bouncing mechanism. The conversation highlights the complexity of photon behavior and the importance of detection in quantum mechanics.

PREREQUISITES
  • Understanding of quantum electrodynamics (QED)
  • Familiarity with photon behavior and properties
  • Knowledge of light reflection principles
  • Basic concepts of quantum mechanics and detection methods
NEXT STEPS
  • Study Richard Feynman's 'QED' for deeper insights into photon behavior
  • Explore the concept of photon absorption and emission in detail
  • Research the implications of quantum mechanics on light reflection
  • Learn about detection methods in quantum physics, such as photon counting
USEFUL FOR

Students of physics, quantum mechanics enthusiasts, and researchers interested in the behavior of light and photons during reflection.

PhilipF
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I have been reading Feynmanns 'QED' and am trying to understand what happens when light is reflected from a surface. I would be grateful if someone could answer the following question. I am not sure which of these views (if any) is correct.
1) When light is reflected from a surface a photon bounces of that surface
2) When light is reflected from a surface a photon is absorbed and another is emitted
3) It is not meaningful to talk about the path of individual photons , they can only be said to exist at the point of detection by some instrument.
 
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#2 is correct.
 

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