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Update 2022-02-15 10:32

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Jean-Sébastien
2022-02-15 10:32:42 +01:00
parent 09a8ba5fb6
commit 6874e66024
204 changed files with 1019 additions and 937 deletions
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build/emsm_esm_di_ld.html
+12 -12
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@@ -1,7 +1,7 @@
<!DOCTYPE html>
<html lang="en">
<head>
<!-- 2022-02-14 Mon 20:35 -->
<!-- 2022-02-15 Tue 10:14 -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Pre-Quantum Electrodynamics</title>
@@ -1605,7 +1605,7 @@ Table of contents
<p>
For many substances: polarization is proportional to field, if the latter isn't too strong:
</p>
<div class="main div" id="org041821f">
<div class="main div" id="org07059aa">
<p>
\[
{\bf P} = \varepsilon_0 \chi_e {\bf E}
@@ -1635,7 +1635,7 @@ In linear dielectrics:
\]
so
</p>
<div class="main div" id="orgca02a34">
<div class="main div" id="org07b7c6e">
<p>
\[
{\bf D} = \varepsilon {\bf E}
@@ -1657,7 +1657,7 @@ This is all just nomenclature, everything is already in \ref{Gr(4.30)}.
<div class="example div" id="orgced0618">
<div class="example div" id="org8bacbfc">
<p>
\paragraph{Example 4.5:} metal sphere of radius \(a\) carrying charge \(Q\), surrounded out to radius \(b\) by
a linear dielectric material of permittivity \(\varepsilon\). Find potential at center (relative to infinity).
@@ -1713,7 +1713,7 @@ of {\it e.g.} \({\bf P}\) would not vanish.
Only case where parallel works: space entirely filled with homogeneous linear dielectric.
</p>
<div class="example div" id="org228d207">
<div class="example div" id="org533d96e">
<p>
\paragraph{Example 4.6:} parallel-plate capacitor filled with insulating material of
dielectric constant \(\varepsilon_r\). What is the effect on the capacitance ?
@@ -1748,7 +1748,7 @@ If \(\rho = 0\), any net charge is on surface, potential then obeys Laplace.
<p>
Convenient to rewrite boundary conditions in terms of free charge: from \ref{Gr(4.26)},
</p>
<div class="main div" id="orgc5f6e9e">
<div class="main div" id="orgfda1e99">
<p>
\[
\varepsilon_{above} E^{\perp}_{above} - \varepsilon_{below} E^{\perp}_{below} = \sigma_f
@@ -1760,7 +1760,7 @@ Convenient to rewrite boundary conditions in terms of free charge: from \ref{Gr
<p>
or in terms of the potential,
</p>
<div class="main div" id="orgbabc33a">
<div class="main div" id="orgad54b08">
<p>
\[
\varepsilon_{above} \frac{\partial V_{above}}{\partial n} -
@@ -1773,7 +1773,7 @@ or in terms of the potential,
<p>
Potential itself is continuous,
</p>
<div class="main div" id="org7e0a475">
<div class="main div" id="org6c12ab4">
<p>
\[
V_{above} = V_{below}
@@ -1785,7 +1785,7 @@ Potential itself is continuous,
<div class="example div" id="org6256125">
<div class="example div" id="org9b58506">
<p>
\paragraph{Example 4.7:} sphere of homogeneous dielectric material in uniform electric field \({\bf E}_0\).
Find electric field inside sphere.
@@ -1843,7 +1843,7 @@ Thus,
<div class="example div" id="org4bf6c06">
<div class="example div" id="orgaec5c97">
<p>
\paragraph{Example 4.8:} suppose region below \(z = 0\) is filled with uniform linear dielectric with susceptibility \(\chi_e\).
Calculate force on point charge \(q\) situated a distance \(d\) above origin.
@@ -1947,7 +1947,7 @@ Special case of linear isotropic dielectric: \({\bf D} = \varepsilon {\bf E}\),
\]
Total work done:
</p>
<div class="main div" id="org4edfc15">
<div class="main div" id="org77190da">
<p>
\[
W = \frac{1}{2} \int d\tau {\bf D} \cdot {\bf E}
@@ -2051,7 +2051,7 @@ target="_blank">Creative Commons Attribution 4.0 International License</a>.
</div>
<div id="postamble" class="status">
<p class="author">Author: Jean-Sébastien Caux</p>
<p class="date">Created: 2022-02-14 Mon 20:35</p>
<p class="date">Created: 2022-02-15 Tue 10:14</p>
<p class="validation"></p>
</div>