From 88537b82784f71104c3a2771330c9e492f57fb03 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sun, 30 Jan 2022 11:27:00 +0100
Subject: Expand knowledge base, remove comments

---
 content/know/concept/electromagnetic-wave-equation/index.pdc | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'content/know/concept/electromagnetic-wave-equation')

diff --git a/content/know/concept/electromagnetic-wave-equation/index.pdc b/content/know/concept/electromagnetic-wave-equation/index.pdc
index 84946bb..59e0125 100644
--- a/content/know/concept/electromagnetic-wave-equation/index.pdc
+++ b/content/know/concept/electromagnetic-wave-equation/index.pdc
@@ -58,9 +58,7 @@ and substitute $\nabla \cross \vb{E}$ according to Faraday's law:
 
 $$\begin{aligned}
     \nabla \cross (\nabla \cross \vb{B})
-    %= \nabla \cross \Big( \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv{\vb{E}}{t} \Big)
     = \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv{t} (\nabla \cross \vb{E})
-    %= \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv{t} \Big( \!-\! \pdv{\vb{B}}{t} \Big)
     = - \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv[2]{\vb{B}}{t}
 \end{aligned}$$
 
@@ -79,9 +77,7 @@ taking the curl of Faraday's law yields:
 
 $$\begin{aligned}
     \nabla \cross (\nabla \cross \vb{E})
-    %= - \nabla \cross \pdv{\vb{B}}{t}
     = - \pdv{t} (\nabla \cross \vb{B})
-    %= - \pdv{t} \Big( \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv{\vb{E}}{t} \Big)
     = - \mu_0 \mu_r \varepsilon_0 \varepsilon_r \pdv[2]{\vb{E}}{t}
 \end{aligned}$$
 
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