Mathematical description of Refractive index in crystal/glass

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SUMMARY

The refractive index of glass is directly related to the number of electrons per unit volume, as discussed in the context of Feynman Lectures, specifically volumes 1 and 2. The discussion emphasizes that while the basic model of an electron being bound to an atom by a restoring force simplifies the concept, it should not be used for engineering applications or comparisons between different types of glass. Understanding this relationship is crucial for grasping the fundamental principles of optics in materials science.

PREREQUISITES
  • Basic understanding of optics and light propagation
  • Familiarity with atomic structure and electron behavior
  • Knowledge of Feynman Lectures, particularly volumes 1 and 2
  • Concept of restoring forces in physics
NEXT STEPS
  • Study the relationship between electron density and refractive index in various materials
  • Explore advanced models of electron behavior in solids
  • Review the Feynman Lectures on optics for deeper insights
  • Investigate practical applications of refractive index in engineering and design
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Students of physics, materials scientists, and optical engineers seeking to understand the fundamental principles of refractive index and its implications in material properties.

Panthera Leo
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Hi,

I have read on a website that the refractive index of glass is related to the number of electrons it has per unit volume.

I don't recall which website it was, but is it true? & if so what is the quantitative description behind it? or is it a lot more complicated :)

Many thanks for the replies.
 
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you should better take a look in feynman lectures vol.1(the origin of refractive index) and 2 both.it is not complicated if you know that an electron can be pictured as bounded to atom by a restoring force.
 
These are very primitive models. Please don't extrapolate any engineering value nor deduce any comparison between glass from these models.
 
andrien said:
you should better take a look in feynman lectures vol.1(the origin of refractive index) and 2 both.it is not complicated if you know that an electron can be pictured as bounded to atom by a restoring force.

Thank you very much indeed.
 

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