Which theory or field can explain this?

AI Thread Summary
The discussion centers on understanding the factors that affect the path of photons, specifically in relation to light sources like bulbs and the sun. Key points include the suggestion that classical geometric optics is sufficient for predicting photon paths, while other theories such as quantum mechanics and astrophysics may not be necessary for this purpose. The conversation emphasizes the importance of focusing on geometric optics to analyze light behavior without delving into complex theories. The mention of ignoring temperature and gravity indicates a desire to simplify the analysis. Ultimately, classical geometric optics provides the foundational knowledge needed to understand light paths effectively.
Christian Grey
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Suppose I am in a room and light(photons) from the light bulb reach my eyes, or I am outside light(photons) from the sun reach my eyes and I am able to see the objects around me.

I want to know what factors affect the path of photons like temperature, gravity etc.I mean by knowing these factors I can predict the path of photon/photons.

And which theory or field can help me in this case? like Quantum field theory,Quantum mechanics etc or Condensed matter physics,Solid state physics, Particle physics,Astrophysics,Cosmology,High Energy Physics etc.
 
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You can ignore temperature and gravity. Classical geometric optics gives you all you need to find out about the paths of light (aka photons).
 

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