[問題] 電磁學 Griffiths
請問..p.129
的式子是是怎麼變出來的 = =a
是傅立葉轉換嗎??
d2X d2Y
____ =k^2 X _____ =-k^2 Y
dx2 dy2
X(x)=Ae^kx+Be^-kx Y(y)=Csinky+Dcosky
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◆ From: 140.112.218.127
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※ 編輯: s777 來自: 140.112.218.127 (10/27 21:51)
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沒錯..
※ 編輯: s777 來自: 140.112.218.127 (10/27 21:59)
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