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Volume 37

Issue 12 | Dec 1969 | pp. 1193-1296

Issue 11 | Nov 1969 | pp. 1091-1192

Issue 10 | Oct 1969 | pp. 953-1089

Issue 9 | Sep 1969 | pp. 853-950

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Volume 1

Select this Article		The Additive Coloration of Alkali Halides G. H. Jirgal, Jr., M. D. Shaw, and G. A. Noble American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 963 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract A description is given of the construction and use of a furnace specifically designed to produce F-centers in alkali halide crystals by additive coloration. The method described avoids corrosion or contamination during the coloration process. Examination of the resultant crystals is discussed and several experiments using additively colored crystals are mentioned.

Select this Article		Einstein and the “Crucial” Experiment Gerald Holton American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 968 \| Cited 3 times Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract This paper was presented on 5 February 1969 at a joint symposium of the AAPT and APS on the history and philosophy of physics, held during the AAPT-APS annual meeting.

Select this Article		The Lorentz Theory of Electrons and Einstein's Theory of Relativity Stanley Goldberg American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 982 \| Cited 2 times Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract The development of Lorentz' theory of electrons is reviewed insofar as it relates to the problem of the electrodynamics of moving bodies. It is shown that the principle of relativity did not play an important role in the Lorentz theory, and that though Lorentz eventually realized the distinctions between his own work and that of Einstein, he was unwilling to completely embrace the Einstein formulation and thereby reject the ether.

Select this Article		A Computer-Guided, General-Education Physics Course Ora M. Kromhout, Steve Edwards, and Guenter Schwarz American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 995 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract The development of an autonomous Computer-Assisted-Instruction (CAI) general-education physics course is described. Based on a one-term conventional course which has been given successfully at Florida State University for several years, the CAI course makes use of an IBM 1500 Instructional System to guide the student through a self-paced program of textbook reading assignments and homework problems, audiotaped lectures, PSSC movies, and film strips of demonstration experiments. The computer provides programmed instruction, giving the student a diagnostic quiz after completion of each unit which he must pass before being allowed to proceed to the next unit. Review lessons on an IBM 1440 Computer System are provided as a supplement to both the CAI course and the conventional course. The CAI course was given for credit to 23 students in the fall of 1967 and to 37 students in the spring of 1968 with satisfactory results which gave some evidence that increasing involvement with CAI seems to produce better grades. Although the number of students involved was small, we conclude that it is possible to give an autonomous CAI physics course that is not only successful in presenting the material to the student, but is also interesting and attractive to the average student.

Select this Article		Analog Simulation of the Bouncing-Ball Problem David J. Pfaltzgraff American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1008 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract This paper endeavors to show, by means of an example, the usefulness of the analog computer as a demonstration tool for undergraduate students. The treatment of the problem is basically theoretical, using laws developed early in physics courses. The results of the computations may be observed graphically or on an oscilloscope, depending upon the circumstances of the demonstration. Also discussed are the distortions of the ball due to impact and possibilities of expanding the problem to include more complex approximations to the real situation.

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Oct 1969

Volume 37, Issue 10, pp. 953-1089

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Select this Article		Eric M. Rogers: Oersted Medalist for 1969 American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 953 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Examinations: Powerful Agents for Good or Ill in Teaching Eric M. Rogers American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 954 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Apparatus for the Study of Charged Particles and Droplets T. G. Owe Berg and T. A. Gaukler American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1013 \| Cited 3 times Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract An apparatus has been constructed for the free suspension of charged particles and droplets in the range 5–200 μ and for their study with respect to charge and mass and their variations with time in various gaseous environments. The apparatus and its functioning are described and illustrated by various applications. It is thought to be a useful research tool in physics, physical chemistry, and other disciplines and also to be useful in laboratory courses on the graduate and undergraduate levels.

Select this Article		Radioactivity Calculations Ronald J. Onega American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1019 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract Three problems in radioactive buildup and decay are presented and solved. Matrices are introduced for the solution of the second problem, and the third example deals in a simple way with flux depression.

Select this Article		Compressivity Tensor and Dispersion Relation for a Plasma Hollis C. Chen American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1022 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract By the introduction of the compressivity and the permittivity tensors, the governing equations for a lossy, compressible, and anisotropic electron plasma are reformulated. The compressivity tensor takes into account the thermal motions of the electrons, while the permittivity tensor characterizes the anisotropy of the medium due to an external static magnetic field. A general dispersion relation with the coefficients in terms of the components of the compressivity and the permittivity tensors is obtained. The nature of the small oscillations in the plasma is thus determined completely by the two tensors. In the general case, the dispersion relation cannot be factorized into products which show the coupling between electromagnetic and plasma waves. Various simplifying assumptions which give some insight into the complex structure of the dispersion relation are examined. Some numerical results are also included.

Select this Article		A Simple Measurement of the Relative Permittivity of an Insulating Liquid P. E. Secker American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1029 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract A simple test cell has been devised in which the charge on one plate of a parallel-plate capacitor is repeatedly transferred to a capacitor—electrostatic voltmeter combination. From the voltmeter readings as the system is operated first in air and then in an insulating liquid, the relative permittivity of the latter can be evaluated with an error of less than 2%.

Select this Article		On the Equivalence of Certain Green's Function Expressions R. K. Cooper American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1032 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract By using an especially simple form of the Sommerfeld-Watson transform, the equivalence is established of quite different appearing expressions for the electrostatic potential obtained by expanding the source function in orthogonal functions of two different coordinates.

Select this Article		Formulation of Special Relativity by Means of Galilean Transformations L. Gomberoff, J. Krause, and C. A. López American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1040 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract Special relativity is formulated in terms of Galilean transformations. This is possible by using the principle of general covariance in the framework of special relativity. In particular the relativistic contraction of lengths and time dilation are discussed. It is further shown that classical electrodynamics also can be formulated consistently when using Galilean transformations. Finally, this result is illustrated by evaluating the field of a uniformly moving charge.

Select this Article		Notes on the Thermodynamics of Paramagnets Herbert A. Leupold American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1047 Online Publication Date: Jul 2005 Full Text: \| Download PDF See Also: Erratum
	+ -	Show Abstract An attempt is made to clarify some of the concepts concerning the interaction of magnetic fields with material bodies. The various ways of writing the equation of the first law of thermodynamics for paramagnets are derived, and apparent contradictions between them are resolved. These different expressions are also compared as to relative utility and esthetic appeal.

Select this Article		The Quadrupole Mass Spectrometer E. Mathieson and T. J. Harris American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1054 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract The quadrupole mass spectrometer is recommended as an instrument for experimentation in the advanced teaching laboratory. An outline is given of the theory of operation of the spectrometer, and factors affecting the resolution are discussed. A laboratory instrument is briefly described, and examples of mass spectra obtained with this instrument are shown.

Select this Article		Is there an Azimuthal Angle Observable? H. S. Perlman and G. J. Troup American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1060 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract The concept of an azimuthal-angle operator canonically conjugate to the z component of angular-momentum operator is known to present certain difficulties in quantum mechanics. These difficulties are resolved rigorously for the first time, and their implications are discussed.

Select this Article		Incorrect Herpolhodes in Textbooks John B. Hart American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1064 \| Cited 2 times Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Born Series for Scattering by a One-Dimensional Delta-Function Potential I. Richard Lapidus American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1064 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Double Sparker for Linear Air Track D. H. Rendell and E. W. Grundke American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1065 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Legendre Transforms, Maxwell's Relations, and the Born Diagram in Fluid Dynamics W. W. Bowley American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1066 \| Cited 2 times Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Another Demonstration of Electrostatic Generator Principles Francis W. Sears American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1067 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Examples and Exercises in “A”-Level Physics H. V. Pilling, Editor and H. L. Armstrong, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1068 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Special Relativity A. P. French, Author and Edward J. Finn, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1068 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Nuclear Reaction Analyses—Graphs and Tables J. B. Marion, Author, F. C. Young, Author, and D. A. Bromley, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1070 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Fundamental Particle Physics, 1967 Tokyo Summer Lectures in Theoretical Physics G. Takeda, Editor, Y. Hara, Editor, and C. R. Hagen, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1070 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Scientific Study of Unidentified Flying Objects: Final Report of Research Conducted by the University of Colorado for the Air Force Office of Scientific Research under the Direction of Edward U. Condon Thornton Page, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1071 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Practical Physics G. L. Squires, Author and Clyde R. Burnett, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1072 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Lie Theory and Special Functions Williard Miller, Jr., Author and L. C. Biedenharn, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1073 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Special Functions. A Group Theoretic Approach Eugene P. Wigner, Jr., Author, James D. Talman, Jr., Author, and L. C. Biedenharn, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1073 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Lightning M. A. Uman, Author and George A. Dawson, Reviewer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1074 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		New England Section William H. Ross American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1075 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Michigan Section Henry O. Hooper American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1076 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Proceedings of American Association of Physics Teachers: Minutes of the Annual Meeting of the Council Alfred Romer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1079 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		American Association of Physics Teachers Budget for 1969 Alfred Romer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1080 Online Publication Date: Jul 2005 Full Text: \| Download PDF
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Select this Article		Proceedings of the American Association of Teachers: Minutes of the Annual Business Meeting of the Association Alfred Romer American Journal of Physics -- October 1969 -- Volume 37, Issue 10, pp. 1082 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable