摘要:

Prepared at the request of the AAPT Committee on Resource Letters.This is one of a series of Resource Letters on various topics, intended to guide college physicists to literature and other teaching aids that may help them improve course content in specified fields of physics. No Resource Letter is meant to be exhaustive and complete. In time, there may be more than one letter on some of the main subjects of interest. Comments and suggestions concerning the content and arrangement of letters as well as suggestions for future topics will be welcomed and should be addressed to Professor Joel E. Gordon, Chairman, AAPT Committee on Resource Letters, Department of Physics, Amherst College, Amherst, Mass. 01002.Notation:An asterisk (*) before an item number indicates items of particular fundamental importance.Reprints:Individual reprints of this Resource Letter may be obtained by sending 25 cents (in cash) per copy, together with a stamped and self-addressed envelope, to the Executive Secretary, American Association of Physics Teachers, 335 East 45th Street, New York, N. Y. 10017.

ISSN:0002-9505    

DOI:10.1119/1.1976245

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

On the basis of past experience in the physics department (Facultad de Ciencias Exactas y Naturales, Univ. de Buenos Aires) a general physics course for natural science students was organized by making a careful selection of subject content, organizing lab and discussion periods, and devoting a number of lecture hours to discuss papers selected from current literature.

ISSN:0002-9505    

DOI:10.1119/1.1976249

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The equations of motion for a ball rolling without slipping on a1/ρsurface of revolution are derived and applied to the case of the ball scattered by the surface. Our result is a simple integral for the scattering angle. In the limiting case that the ball is small, the integrand is a known function. In the general case it contains several power series.

ISSN:0002-9505    

DOI:10.1119/1.1976253

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

A modified Fokker-Planck equation is derived to describe Brownian motion for the case of large viscosity. The derivation uses the quasi Huygens relation developed by Chandrasekhar as a starting point. The modified relation is shown to be capable of directly yielding the Smoluchowski equation. Moreover, the momentum-conservation equation to which it gives rise is also investigated.

ISSN:0002-9505    

DOI:10.1119/1.1976257

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The basic notions associated with the idea of an “effective interaction” in nuclear physics are sketched by first recallingisolated two-body scatteringanalyzed with integral equations and in which thetransition operatorappears naturally. Brueckner'sreaction matrixoperator is discussed in the context of bothinfinitenuclear matter andfinitenuclei with doubly closed shells. Finally, open-shell nuclei are touched upon by way of amany-body effective interactionoperator deduced in simple language and a possible connection between this and the reaction matrix operator is given. It is emphasized throughout that the basic merit of the vantage-point sketched here is its fundamental origin in the many-body Schrödinger equation.

ISSN:0002-9505    

DOI:10.1119/1.1976261

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The Aharonov-Bohm effect is relatively little known, but it poses fundamental questions in quantum theory. It concerns physical effects on charged particles in field-free regions. The present paper provides an over-all critical review and commentary on the literature of the Aharonov-Bohm effect. The two fundamental questions raised by the effect concern the role of the force concept in quantum mechanics, and the localizability of physical effects principle. A recent letter from Professor Bohm concerning his evaluation of the significance of the effect is included in the Appendix.

ISSN:0002-9505    

DOI:10.1119/1.1976266

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The paper pays homage to H. Kamerlingh Onnes by pointing out that he constructed the first properly functioning model of the Foucault pendulum. His success was largely due to an analysis which takes into account the unavoidable mechanical asymmetry of the pendulum. Based on the analysis he was able to eliminate the asymmetry and to obtain the desired performance which earlier workers had realized only to a limited extent. Onnes' analysis is reproduced with more modern tools such as vector notation and, especially, the concept of eigenfunctions. His analysis is probably one of the earliest examples of a particular type of doubly degenerate perturbation theory. Two different effects compete for lifting the degeneracy, one favoring “circular polarization,” the other “linear polarization.” The resulting eigenfunctions represent “elliptical polarization.” The tutorial significance of this perturbation theory is emphasized by mentioning other fields where it is applied if perhaps disguised by a different jargon and analytic technique. Examples include electromagnetic theory (microwave cavities for circular polarization), laser optics (mode analysis of ring lasers for rotation sensing), and quantum theory (quenching of orbital angular momentum by crystalline field).

ISSN:0002-9505    

DOI:10.1119/1.1976270

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

A simplified derivation of the low-frequency bremsstrahlung cross section in the classical limit is presented. Also, by expanding Elwert's exact quantum-mechanical expression for the cross section in powers of(Ze2/ħv)2and in powers ofħv/Ze2, corrections are obtained to the Born-limit and classical formulas, respectively. Averaging over a Maxwellian distribution of incident electrons gives the low-frequency thermal emission and absorption coefficients; corrections to the Born-limit and classical formulas are expressed as power series inZ2 Ry/kTand(kT/Z2 Ry)1/2, respectively. Significantly, the coefficient of the first-order correction term for the classical formulas for the cross section, and thermal coefficients turns out to be zero.

ISSN:0002-9505    

DOI:10.1119/1.1976274

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

This translation of the treatise by Robert Grosseteste (1167–1253)On the Rainbow(1235) categorizes the then-known types of optical phenomena as results of direct, reflected, and refracted light. His discussion of optics as a geometrical science, concerned therefore with explanation rather than description alone, introduces the following subjects: real visual rays, the law of refraction in terms of the law of reflection, the position of an image in refraction in terms of image-position in reflection, the rainbow, and color theory. Whereas all these discussions show the primitive state of the science, the law of refraction and the attribution of refraction to the rainbow are notable as the first influential attempts along these lines in the history of optics.

ISSN:0002-9505    

DOI:10.1119/1.1976279

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

Studies of the birefringence of liquid crystals by means of Newton's rings are described. Some results for 4-4′-dihexoxyazoxybenzene are given. These experiments are suitable for student laboratories.

ISSN:0002-9505    

DOI:10.1119/1.1976283

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP