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Table of Content
20 January 2007 Volume 26 Issue 1
著者文摘
From Michelson＇s interferometer to optical coherence tomography
. 2007, 26(1): 1-1.
Abstract
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794
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611
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The great contribution of the Michelson＇s interferometer in physics and the development condition in biomedical imaging technology are introduced. From the development process of Michelson＇s interferometer, the principles and Characters of optical coherence tomography and its applications in biomedical imaging, physics / and materials science are discussed, then the spectral optical coherence tomography is compared with Fourier transform spectrometry. At last its significance in teaching is discussed.
Discussions on the superposition principle of states in quantum mechanics
. 2007, 26(1): 7-7.
Abstract
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1037
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(352KB) (
673
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The meaning of superposition principle of states in quantum mechanics is discussed. Comments on some expressions and explanations of it, and some statements of it using simple and plain words are given.
Solution of a particle＇s motion in a one-dimensional infinite square potential well using path integral
. 2007, 26(1): 10-10.
Abstract
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975
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925
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A method to calculate the propagator for a particle moring in a one-dimensional infinite square well using Feynman＇ s path integral is presented. Wave function and energy spectrum are derived from the propagator, which manifest the equivalence between path integral and traditional methods. Meanwhile, a interesting mathematical function, Jacobi theta function θ3, is introduced.
The upper limit of the size of a outer space ecosystem
. 2007, 26(1): 13-13.
Abstract
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716
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516
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By adopting two simple model, the maximum size of a outer space ecosystem is given.
The Earth＇s orbit under the action of gravitation of the Jupiter only
. 2007, 26(1): 17-17.
Abstract
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960
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(149KB) (
419
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if the Sun disappeared, and the Earth would be attracted by the Jupiter only, then the orbit of the earth would be hyperbola or rectilinear relative to the Jupiter.
The internal forces, the moment of internal forces and the work done by them in a moving rod pendulum
. 2007, 26(1): 19-19.
Abstract
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1227
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(300KB) (
449
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The tangential in,ternal force and its moment and the normal internal force and its moment in a moving rod pendulum are discussed. The work done by the internal forces and the moment Of internal forces are calculated. The discussion might be meaningful for correctly understanding some physical models like particle and rigid body.
Magnetic monopole and magnetic Lorentz force
. 2007, 26(1): 22-22.
Abstract
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1110
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(389KB) (
1151
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The historical development for the concept of magnetic monopole is briefly described. According to Lorentz transformation, the relativistic covariant of electromagnetic field tensor and 4 - dimension forces, and the relativistic invariance of electric charge, it can be directly proved that a moving magnetic monopole will be actedby a magnetic Lorentz force, and that the magnetic Lorentz force has the same accuracy as the Coulomb low. Dirac quantization condition of electric charge is derived with magnetic Lorentz forces. Finally, an experimental scheme to test and verify the magnetic Lorentz force is suggested.
Guidance characteristics in asymmetric left-handed material slab waveguides
. 2007, 26(1): 26-26.
Abstract
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966
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830
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Guidance characteristics in asymmetric left-handed material （LHM） slab waveguides are analyzed theoretically, Several lower-order transverse electric modes （TE） and transverse magnetic modes （TM） are calculated numerically and the dispersion curves are obtained. Some abnormal properties of guided modes in asymmetry left-handed material slab waveguides are discussed.
A design of the integrated experiment on rotating liquid
. 2007, 26(1): 29-29.
Abstract
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1463
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(398KB) (
1525
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An integrated experiment design scheme is presented to measure the gravity acceleration and the viscosity coefficient using a rotating liquid optics method. This experiment has been implemented in college education as an open experiment.
Several measuring methods of the refractive index of liquid
. 2007, 26(1): 34-34.
Abstract
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7368
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(346KB) (
2891
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Five measuring methods of refractive index of liquid are introduced. It includes method of irradiation of laser, method of diffraction grating, method of optical fiber Young＇s interference, method of Abbemat refractometer, and method of measuring by CCD. All of these methods are simple for operation, and their principles are easy to understand. The characters of each method are also analysed.
The research of a experiment of thermoelectrie refrigeration
. 2007, 26(1): 38-38.
Abstract
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892
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(243KB) (
465
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The experimental principle and method about thermoelectric refrigeration are introduced.
An instrument demonstrating the phase and frequency characteristics of RLC circuit
. 2007, 26(1): 41-41.
Abstract
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778
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(238KB) (
495
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An instrument demonstrating the phase and frequency characteristics of RLC circuit using simple oscillators is reported .
The outstanding representative of Chinese good physicist T.S. Ke
. 2007, 26(1): 44-44.
Abstract
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1045
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(540KB) (
669
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Though briefly reviewing all of T. S. Ke＇s life, all of his research works and all of his contribution in teaching, the academician＇s lofty sentiments are shown, the author also analyses what is the reasons that help the academician to get the eminent achievements.
Characteristics of modern digitization of physics teaching
. 2007, 26(1): 49-49.
Abstract
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671
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(903KB) (
891
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The characteristics of modern computerization of physics teaching are presented in company with some research achievements. It is shown that digitization of physics helps students understand and visualize knowledge of physics to some deep extent.
The measurement of sound speed and the study of sound waves
. 2007, 26(1): 58-58.
Abstract
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879
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(310KB) (
585
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The speed of sound wave is measured utilizing sympathetic vibration interference, phase comparison, ultrasonic interference and diffraction, reflection of Lloyd＇s mirror. These improvements are supposed to expand the measurement method and deepen the understanding of the laws of waves.
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