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Table of Content
20 January 2006 Volume 25 Issue 1
著者文摘
From traditional Newtonian mechanics to the jerky dynamics of today
. 2006, 25(1): 1-1.
Abstract
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732
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1150
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It is a tendency that the new concepts of jerk and jerky dynamics become a part of course of the university physics. A elementary teaching frame of the new concepts on jerky dynamics is constructed.
Focusing theorem of geometric optics in curved space-time
. 2006, 25(1): 4-4.
Abstract
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592
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(369KB) (
622
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The focusing theorem of geometric optics in curved space-time be proved strictly and in detail.
The oscillation of one dimensional molecule with three atoms
. 2006, 25(1): 8-8.
Abstract
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917
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(229KB) (
610
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An oscillation system of a molecule with three atoms is considered. The formula of eigenfrequency of the system is obtained by using the method of reducing matrices to normal form. Some particular cases are also considered.
The charge distribution and electromagnetic field of an axially symmetric conductor rotating in a uniform steady magnetic field
. 2006, 25(1): 11-11.
Abstract
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628
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(500KB) (
610
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An error of judgment in some papers is discussed. By the conservation law of charge it is proved that, the divergence of the electric field E = ±v × B caused by a rotating magnetic field is not a nature cognate with true volume density of charge, but only a relativistic effect. And by the transformation of electromagnetic fields, a solution method of surface density of charge and electromagnetic field of an axially symmetric conductor rotating in a uniform steady magnetic field is given. The surface density of charge and electromagnetic field of a conducting sphere rotating in a uniform steady magnetic field are also obtained.
Discussion on imagery of cylindrical mirror
. 2006, 25(1): 17-17.
Abstract
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1388
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(172KB) (
1065
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The equation of cylindrical mirror imagery is given, some relation maps of object and its image are drawn by computer.
The refraction of e beam within the principal cross section of a uniaxial crystal studied by computer assistance
. 2006, 25(1): 19-19.
Abstract
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866
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(449KB) (
1243
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The formulation and simulation of the refraction of e beam within the principal cross section of a uniaxial crystal in accordance with the Huygen＇s principle and by MATLAB, respectively. The double refraction is clearly illustrated.
Microscopic digital states
. 2006, 25(1): 23-23.
Abstract
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715
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PDF
(407KB) (
314
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When the size of electric elements or cells of a system reduce to nanometer, the quantum laws must act on its way. A binary digit of just getting by this kind of systems corresponds to a micro-state of it. The complexity of micro-states can be defined by the bits of binary digits. From different forms of incommutable algebra. We got several expressions of micro-digital states. However an appropriate incommutable algebra must be selected by experiments. In addition, we may link the quasi-charges of a state with the energy levels of the micro-system, so the quasi-charge becomes an observed physical quantity, and we can analyze them in quantities by means of physical methods.
The Lagrange equation and its application in center-of-mass frame of reference
. 2006, 25(1): 28-28.
Abstract
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880
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(153KB) (
347
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The Lagrange equation in center-of-mass frame of reference is derived. The constrain force can be obtained by using the Lagrange equation in center-of-mass frame of reference and the Lagrange equation in inertial reference frame, and an example is given to illustrate the application of the result.
A method for deriving the formulas E=mc^2 and m=m0/√1-v^2/c^2
. 2006, 25(1): 30-30.
Abstract
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882
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(167KB) (
315
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The two formulas in the title are derived by optical means.
The distribution of the magnetic line of force and the formula for magnetic induction induced by a circular current
. 2006, 25(1): 32-32.
Abstract
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1313
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(515KB) (
1398
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The equation of the magnetic line of force induced by a circular current is derived. The distributional pattems satisfying the equation are drawn by mathematical software MatLab. The formula for magnetic induction is deduced by following B=↓△×A. The patterns of the magnetic induction B are drawn by the software.
Reflection and refraction of an elliptical polarized electromagnetic wave
. 2006, 25(1): 38-38.
Abstract
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649
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PDF
(227KB) (
342
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The elliptical polarized waves that is incident to the interface is decomposed into two mutually orthogonal ones that one is vertical to the interface, another is parallel to it. The reflected and refracted electromagnetic waves that composed by the Fresnel-formula and the superposition principle usually are elliptical polarized waves.
The most probable distribution, the number of microstates and related problems
. 2006, 25(1): 41-41.
Abstract
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1493
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(421KB) (
818
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In thermodynamic limit the ratio of the number of states involved in the most probable distribution to all possible states accessible to the system is zero. The most probable distribution and its vicinal distributions include approximately all of the states accessible to the system, and by vicinal we mean very small in comparison with the experimental reachable accuracy.
A patch to ＂A different opinion on rearranging the theory of the second law of thermodynamics＂
. 2006, 25(1): 45-45.
Abstract
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589
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PDF
(168KB) (
387
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There are some mistakes in my paper ＂A different opinion on rearranging the theory of the second law of thermodynamics＂, this paper remedis them.
Measuring Young＇s modulus of materials using CCD
. 2006, 25(1): 47-47.
Abstract
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672
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PDF
(329KB) (
602
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A new method of measuring small extention is put forward. The light intensity of single slit diffraction is converted to electric signal by CCD photo-electric measuring system and outputs curve of light intensity distribution after computer processing. Read the interval of diffraction marking from adjacent wave through and output results through simple operation of software. It implements date acquisition and operation results real-timely and semiautomaticly. It overcomes the difficulty of conventional measurement method and complex calculation of date-processing. The Young＇ s modulus of elasticity is measured by this method and the results agree with the nominal value very well.
Investigation on absorption spectrum of chlorophyll
. 2006, 25(1): 50-50.
Abstract
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892
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(462KB) (
1295
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The characteristics of the absorption spectra of chlorophyll molecule are studied and analyzed with optical multi-channel analyzer （OMA）. The experiment demonstrated can be directly applied to corresponding experimental courses in universities. To the students, it can improve their knowledge of cross-field between different subjects, and the integrative ability of research.
The research and its significance of the core physics periodicals in foreign countries
. 2006, 25(1): 54-54.
Abstract
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527
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(677KB) (
462
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A diveloping method of evaluating the core periodicals of physics in foreign countries is introduced particularly,the role of the method that plays in establishment and extension of physics literature resource is presented, and the conclusion of those core periodicals is appraised objectively by our method.
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