Understanding Specular Reflection: QED Explanation & Material Differences

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In summary, the QED explanation for specular reflection of light involves photons interacting with electrons and being re-emitted in any direction, which works well for diffuse reflections but not for specular reflections. The difference in materials' ability to specularly reflect light is explained in Feynman's book "QED".
  • #1
DanP
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What is the QED explanation for specular reflection of light ?

I mean, if photons interact with electrons, and a photon is re-emitted, I assume it can be emitted in any direction whatsoever. So this might work great for diffuse reflections. But what about specular reflections? How are they accounted for ?

Also, what makes material different in terms of how well they do speculary reflect light ? For example why Hg makes such a great specular reflector ?
 
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  • #2
Feynman's book "QED" will supply answers to your questions.
 
  • #3
mathman said:
Feynman's book "QED" will supply answers to your questions.

Guess then Ill wait till I finish the the book to satisfy my curiosity =)
 

Related to Understanding Specular Reflection: QED Explanation & Material Differences

1. What is specular reflection?

Specular reflection is a type of reflection that occurs when light hits a smooth surface and bounces off at the same angle as it came in. It is also known as mirror-like reflection.

2. How does QED explain specular reflection?

QED, or quantum electrodynamics, explains specular reflection by describing how photons, the particles of light, interact with the electrons in the material. The photons are absorbed by the electrons and then re-emitted, resulting in the reflection of light.

3. What are the differences in specular reflection between different materials?

The differences in specular reflection between materials depend on their physical properties, such as their surface smoothness and chemical composition. A smoother surface will result in a more pronounced specular reflection, while a rougher surface may lead to diffuse reflection instead.

4. How does the angle of incidence affect specular reflection?

The angle of incidence, or the angle at which light hits a surface, is directly related to the angle of reflection in specular reflection. The law of reflection states that the angle of incidence is equal to the angle of reflection, meaning that the angle of incidence affects the direction in which light is reflected.

5. Can specular reflection be controlled or manipulated?

Yes, specular reflection can be controlled or manipulated by altering the surface of the material. For example, a surface can be polished to increase specular reflection, or a coating can be applied to decrease it. Additionally, the angle of incidence can also be adjusted to change the direction of the reflected light.

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