Light and Reflections in Space

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SUMMARY

The discussion centers on the behavior of light and reflections in space, specifically referencing Richard Feynman's book on Quantum Electrodynamics (QED). A participant inquires about locations in the universe with significant thickness of matter or energy that light can reflect off. Another participant suggests the concept of a Reflection Nebula, which is a region where light reflects off dust and gas. Additionally, the reflective properties of thin gold sheets are mentioned as an example of light reflection.

PREREQUISITES
  • Understanding of Quantum Electrodynamics (QED)
  • Familiarity with Reflection Nebulae
  • Knowledge of light behavior and reflection principles
  • Basic concepts of material properties, such as those of gold
NEXT STEPS
  • Research the properties and formation of Reflection Nebulae
  • Study the principles of light reflection and refraction
  • Explore the applications of thin film optics
  • Investigate the role of dust and gas in astrophysical phenomena
USEFUL FOR

Astronomy enthusiasts, physicists studying light behavior, and anyone interested in the properties of materials in astrophysical contexts.

Marc_72
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I am reading Feynman's book on QED and something struck me about light. I know that we can only calculate the probability of where a photon goes. After that I came across how a partial reflection affects light. My question is, is there a place in the universe where there is a great thickness of matter or energy that light reflects off of?p.s I apologize in advance if I am in the wrong forum.
 
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Welcome to the PF. :smile:

Do you mean like a Reflection Nebula? https://en.wikipedia.org/wiki/Reflection_nebula

200px-Reflection.nebula.arp.750pix.jpg
 

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Marc_72 said:
where there is a great thickness of matter or energy that light reflects off of?

You don't have to go very far. Gold can be formed into very thin sheets several millionths of an inch thick and it will reflect most of the light incident upon it.

HTB16SAISXXXXXXQXXXXq6xXFXXXQ.jpg


But I am pretty sure that is not what you were thinking?
 

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