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nr. 475 - 2010 - Institut for Natur, Systemer og Modeller (NSM)

nr. 475 - 2010 - Institut for Natur, Systemer og Modeller (NSM)

nr. 475 - 2010 - Institut for Natur, Systemer og Modeller (NSM)

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118 Invarians af Maxwells ligninger<br />

Skrevet ud i koordinater lyder de<br />

∂Ex<br />

∂x<br />

∂Bx<br />

∂x<br />

+ ∂Ey<br />

∂y<br />

+ ∂By<br />

∂y<br />

∂Ez<br />

∂y<br />

∂Ex<br />

∂z<br />

∂Ey<br />

∂x<br />

∂Bz<br />

∂y<br />

∂Bx<br />

∂z<br />

∂By<br />

∂x<br />

+ ∂Ez<br />

∂z<br />

+ ∂Bz<br />

∂z<br />

− ∂Ey<br />

∂z<br />

− ∂Ez<br />

∂x<br />

− ∂Ex<br />

∂y<br />

= 0 (8.5)<br />

= 0 (8.6)<br />

= −∂Bx<br />

∂t<br />

= −∂By<br />

∂t<br />

= −∂Bz<br />

∂t<br />

∂By<br />

−<br />

∂z = µo<br />

∂Ex<br />

ɛo<br />

∂t<br />

∂Bz<br />

−<br />

∂x = µo<br />

∂Ey<br />

ɛo<br />

∂t<br />

∂Bx<br />

−<br />

∂y = µo<br />

∂Ez<br />

ɛo<br />

∂t<br />

(8.7)<br />

(8.8)<br />

(8.9)<br />

(8.10)<br />

(8.11)<br />

(8.12)<br />

Vi ønsker at vise, at Maxwells ligninger har samme <strong>for</strong>m i alle inertialsystemer.<br />

Lorentztrans<strong>for</strong>mationen fra inertialsystemet S til inertialsystemet S ′<br />

vil i dette afsnit blive skrevet på <strong>for</strong>men<br />

x ′ = γ (x − v t) y ′ = y z ′ = z t ′ = γ (t − v<br />

c 2 x) (8.13)<br />

hvor<br />

γ =<br />

1<br />

<br />

1 − v<br />

c<br />

2<br />

(8.14)

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