美国物理教师协会
期刊
会议
图书
作者:Travis Norsen , Mackenzie Dreese , Christopher West
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.663-669AAPT
摘要:According to a standard, idealized analysis, the Moon would produce a 54 cm equilibrium tidal bulge in the Earth's oceans. This analysis omits many factors (beyond the scope of the simple idealized model) that dramatically influence the actual height and timing of the tides ...
作者:Marcos Amaku
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.692-697AAPT
摘要:The usual definition of the time evolution operator e − i H t / ℏ = ∑ n = 0 ∞ 1 n ! ( − i ℏ H t ) n , where H is the Hamiltonian of the system, as given in almost every book on quantum mechanics, causes problems in some situations. The operators that appear in quan...
作者:Timothy H. Boyer
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.670-675AAPT
摘要:A simple junior-level electrodynamics problem is used to illustrate the interference between a source-free standing plane wave and a wave generated by a pulse in a current sheet. Depending upon the relative phases between the standing wave and the current pulse and also upon the ...
作者:Daniel V. Schroeder
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.698-704AAPT
摘要:I describe a simple algorithm for numerically finding the ground state and low-lying excited states of a quantum system. The algorithm is an adaptation of the relaxation method for solving Poisson's equation, and is fundamentally based on the variational principle. It is especial...
作者:Guido Pegna
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.712-720AAPT
摘要:A compact, low-cost, pre-aligned apparatus of the modulation type is described. The apparatus allows accurate determination of the speed of light in free propagation with an accuracy on the order of one part in 104. Due to the 433.92 MHz radio frequency (rf) modulation...
作者:Tevian Dray
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.683-691AAPT
摘要:Geometric treatments of both special and general relativity are outlined, suitable for students in the sciences who are seeing these topics for the first time. Both the advantages and disadvantages of such an approach, and its relationship to more traditional approaches, are then...
作者:Jonathan Fernsler , Vincent Nguyen , Alison Wallum ...
来源:[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (9), pp.655-662AAPT
摘要:A Brewster Angle Microscope (BAM) built from a LEGO Mindstorms kit, additional LEGO bricks, and several standard optics components, is described. The BAM was built as part of an undergraduate senior project and was designed, calibrated, and used to image phospholipid, choles...

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