Edlisfraedi_2_Kafli_32_Allur - 32 kafli Rafsegulbylgjur...

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32. kafli Rafsegulbylgjur Í kaflanum eru 6 greinar : 1. Jöfnur Maxwells og rafsegulbylgjur 2. Planrafsegulbylgjur og hraði ljóssins 3. Sínuslaga rafsegulbylgjur 4. Orka og skriðþungi í rafsegulbylgjum 5. Standandi bylgjur 6. Róf rafsegulbylgna
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Inngangur Áður: Rafsvið og segulsvið, tímaháðar breytingar, jöfnur Maxwells Núna: Rafsegulbylgjur dt d l d B E Φ = 0 0 ε μ dt d l d E B Φ - = ........ ........ B E
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lægri orka hærri orka Orkuróf rafsegulbylgna rafkerfið útvarpsbylgjur örbylgjur innrautt ljós, IR sýnilegt ljós útfjólublátt ljós, UV röntgenbylgjur gammageislar GSM Jónandi geislun Ójónandi geislun
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encl E C dt d i l d B ) ( 0 0 Φ + = ε μ = 0 A d B = 0 ε encl Q A d E dt d l d E B Φ - = Symmetría milli E og B í tómarúmi, þá er Q = 0 og i C = 0: dt d l d B E Φ = 0 0 ε μ dt d l d E B Φ - = Breytilegt segulsvið veldur rafsviði og breytilegt rafsvið veldur segulsviði. §1 Jöfnur Maxwells og rafsegulbylgjur ... truflun, eða frávik, sem getur borist út .... Bylgja ... !
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Jöfnur Maxwells ... Hleðsla sem er kyrr veldur rafsviði, en ekki segulsviði. Hleðsla á jöfnum hraða veldur bæði raf- og segulsviði.
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