Effect of electrical permittivity on the speed of light

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SUMMARY

An increased electrical permittivity in a medium results in a reduced phase velocity of light, as defined by the relationship between the speed of light, electrical permittivity, and magnetic permeability. The equation governing this relationship is crucial for understanding how light interacts with different materials at an atomic level. The discussion emphasizes the importance of comprehending these fundamental concepts to grasp the underlying physics of light propagation in various media.

PREREQUISITES
  • Understanding of electrical permittivity and magnetic permeability
  • Familiarity with the equation for the speed of light in a medium
  • Basic knowledge of wave propagation in physics
  • Concepts of atomic interactions with electromagnetic waves
NEXT STEPS
  • Research the equation for the speed of light in different media
  • Explore the relationship between electrical permittivity and phase velocity
  • Study atomic interactions with electromagnetic radiation
  • Investigate the effects of different materials on light speed
USEFUL FOR

Students and professionals in physics, optical engineers, and anyone interested in the fundamental principles of light propagation and material interactions.

Muggo
Why does an increased electrical permittivity reduce the phase velocity of light in a medium? Furthermore, what interactions do we see on an atomic level?

I am aware of the equation that defines the speed of light in terms of the electrical permittivity and magnetic permeability, but I do not understand their relationship.

Many thanks to anyone who is able to answer this question or/and refer me to a resource where I can obtain an answer! :smile:
 
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Have you tried Wikipedia or any of the other well known sites? Google is often a very good start and anyone can use it.
 
Muggo said:
Why does an increased electrical permittivity reduce the phase velocity of light in a medium? Furthermore, what interactions do we see on an atomic level?

I am aware of the equation that defines the speed of light in terms of the electrical permittivity and magnetic permeability, but I do not understand their relationship.

Many thanks to anyone who is able to answer this question or/and refer me to a resource where I can obtain an answer! :smile:
You already have a thread going on this question. Please do not cross-post across the PF forums. This copy is now locked.

https://www.physicsforums.com/threa...al-permittivity-on-the-speed-of-light.923520/
 

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