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標題: [學術探討] Physics help [打印本頁]

作者: Amuro 時間: 2011-11-1 23:10 標題: Physics help

The rate of flow of electromagnetic energy P through an area A placed normal to an electromagnetic wave will depend upon the permeability of free space μ0, and upon the instantaneous values of the electric field E, and magnetic field B. Find a possible relationship between these five quantities.

作者: Amuro 時間: 2011-11-1 23:20

有比答案 = dP/dt ∝ AEB/μ0
但要寫steps

作者: kimwong3252000 時間: 2011-11-2 16:35

electricity未教,幫唔到你

作者: UniCorn 時間: 2011-11-2 16:37

教咗唔記得晒...
本書喺香港 =~=

作者: m11 時間: 2011-11-2 19:02

這是甚麼程度的電學...囧

作者: Amuro 時間: 2011-11-2 19:11 標題: 回復 #5 m11 的帖子

同電學無關只係搵relationship
MLT^-1果d
但我睇唔明..

作者: UniCorn 時間: 2011-11-3 08:51

QUOTE:

原帖由 Amuro 於 2011-11-2 07:11 PM 發表
同電學無關只係搵relationship
MLT^-1果d
但我睇唔明..

QUOTE:

原帖由 Amuro 於 2011-11-1 11:10 PM 發表
The rate of flow of electromagnetic energy P through an area A placed normal to an electromagnetic wave will depend upon the permeability of free space μ0, and upon the instantaneous values of the electric field E, and magnetic field B. Find a possible relationship between these five quantities.

要是跟electromagnetism 無關的話, 那些 quantities' relationship 只有英文字母...

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