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test-regular-2
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a974b334
Commit
a974b334
authored
Mar 19, 2020
by
Claude Meny
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Update textbook.fr.md
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textbook.fr.md
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01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
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a974b334
...
@@ -261,13 +261,13 @@ donne la période spatiale de l'onde.
...
@@ -261,13 +261,13 @@ donne la période spatiale de l'onde.
L'
**écriture générale**
d'une onde EM plane progressive monochromatique est :
L'
**écriture générale**
d'une onde EM plane progressive monochromatique est :
$
`\overrightarrow{E}(\pm\,\overrightarrow{k}\cdot\overrightarrow{r}\pm \omega\,t)\quad`
$
$
`\overrightarrow{E}(\pm\,\overrightarrow{k}\cdot\overrightarrow{r}\pm \omega\,t)\quad`
$
et $
\q
uad
`\overrightarrow{B}(\pm\,\overrightarrow{k}\cdot\overrightarrow{r}\pm \omega\,t))`
$
et $
`
\quad`
\o
verrightarrow{B}(
\p
m
\,\o
verrightarrow{k}
\c
dot
\o
verrightarrow{r}
\p
m
\o
mega
\,
t))
`$
Si je choisis un repère cartésien $`
(O,
\o
verrightarrow{e_x},
\o
verrightarrow{e_y},
\o
verrightarrow{e_z})
`$
Si je choisis un repère cartésien $`
(O,
\o
verrightarrow{e_x},
\o
verrightarrow{e_y},
\o
verrightarrow{e_z})
`$
dont $`
\o
verrightarrow{e_z}=
\o
verrightarrow{u}
`$, alors l'écriture se simplifie :
dont $`
\o
verrightarrow{e_z}=
\o
verrightarrow{u}
`$, alors l'écriture se simplifie :
$`
\o
verrightarrow{E}(
\o
verrightarrow{r},t)=
\o
verrightarrow{E}(
\p
m k z
\p
m
\o
mega t)
\q
uad
`$
$`
\o
verrightarrow{E}(
\o
verrightarrow{r},t)=
\o
verrightarrow{E}(
\p
m k z
\p
m
\o
mega t)
\q
uad
`$
et $
\q
uad
`\overrightarrow{B}(\overrightarrow{r},t)=\overrightarrow{B}(\pm k z \pm \omegat)`
$
et $
`
\q
uad
`\overrightarrow{B}(\overrightarrow{r},t)=\overrightarrow{B}(\pm k z \pm \omegat)`
$
*
$
`\overrightarrow{E}(kz-ct)`
$ ou $
`\overrightarrow{E}(-kz+ct)`
$ indique une onde plane
*
$
`\overrightarrow{E}(kz-ct)`
$ ou $
`\overrightarrow{E}(-kz+ct)`
$ indique une onde plane
progressive monochromatique qui se déplace vers les $
`z`
$ croissants.
progressive monochromatique qui se déplace vers les $
`z`
$ croissants.
...
...
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