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An electromagnetic cavity is a cavity that acts as a container for electromagnetic fields such as photons, in effect containing their wave function inside. The size of the cavity determines the maximum photon wavelength that can be trapped. Additionally, it produces quantized energy levels for trapped charged particles like electrons and protons. The earth's magnetic field in effect places the earth in an electromagnetic cavity. == Physical description of electromagnetic cavities == Electromagnetic cavities are represented by potential wells, also called ''boxes'', which can be of limited or unlimited depth V0. Quantum-mechanic boxes are described by the time-independent Schrödinger equation: : with the additional boundary conditions * the wave function is confined to the box (infinite deep potential well) or approaches zero as the distance from the wall increases to infinity, thus normalisable * the wave function must be continuous * the derivative of the wave function must be continuous which leads to real solutions for the wave functions if the net energy of the particle is negative., i.e. if the particle is in a bound state. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electromagnetic cavity」の詳細全文を読む スポンサード リンク
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