All Questions
6
questions
2
votes
2
answers
378
views
Dielectric and dipole
When a molecule of a dielectric material is placed in an electric field, the molecule acquires an electric dipole moment. Why?
- 41
0
votes
1
answer
36
views
How did the scientist measure the dielectric constant? Does the dielectric constant relate to an alignment with the electric field?
I heard that the dielectric constant of water is around 78. When we think about the way we get the $\kappa$ of water,
Can we get the $\kappa_{water}$ by putting the water molecules on the $\vec{E}_{...
- 3
1
vote
2
answers
71
views
$\vec{E}$-field in toroidal polarized dielectric
In an electrostatic situation, imagine a dielectric torus that is permanently polarized with polarization given by:
$\vec{P} = P(r, z) \hat{\phi}$
(Here cylindrical coordinates are used with the $z$-...
- 21
0
votes
2
answers
98
views
In Maxwell's equations concerning dielectric materials , does the electric field represent the external electric field or the net electric field?
Let's assume we have dielectric material and we apply an external electric field that acts on it (let's call it Ex ) . As a resault we get dipoles who in turn create another electric field (let's call ...
- 329
1
vote
4
answers
384
views
Dielectric constant of crystals: Feynman's mistake?
Feynman mentioned in his lecture that we can, in some way, obtain dielectric constant of crystals by summing up the electric field due to dipoles. For example, equation (11.33) from above link shows ...
- 67
0
votes
1
answer
215
views
Dipoles in 2D and 'dipolar line'
I am currently studying the textbook Surface Enhanced Raman Spectroscopy -- Analytical, Biophysical, and Life Science Applications by Sebastian Schlücker, Wolfgang Kiefer. Chapter 1.2.3.2 Localized ...
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