ISSN:0002-9505    

DOI:10.1119/1.16663

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.16665

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

This Resource Letter provides a guide to literature on laser spectroscopy. Emphasis has been placed on various spectroscopictechniquesrather than the results obtained by the laser spectroscopy. The letter E after an item indicates elementary level or material of general interest. The letter I, for intermediate level, indicates material of somewhat more specialized nature; and the letter A indicates rather specialized or advanced material. An asterisk (*) indicates articles to be included in an accompanying Reprint Book.

ISSN:0002-9505    

DOI:10.1119/1.16837

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

Norman Ramsey has recently been awarded the Nobel Prize for the ‘‘molecular beam resonance method with separated oscillating fields’’ [Phys. Rev.78, 695–699 (1950)]. It is shown explicitly, for pedagogical purposes, how the use of rotating‐coordinate systems, introduced by Rabietal. [Rev. Mod. Phys.26, 167–171 (1954)] for the solution of magnetic‐resonance problems can be extended to the case of Ramsey’s method with separated oscillating fields.

ISSN:0002-9505    

DOI:10.1119/1.16666

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

Many studies in physics education indicate that our conventional instruction fails to achieve objectives we desire for our students. Students leave introductory courses unable to reason qualitatively about physical processes. They use primitive formula‐centered problem‐solving techniques. Their minds contain a small number of facts and equations that are accessible only by random searches. In recent years, research by scientists interested in cognition and pedagogy has shown that we can do much better. This paper reviews this research and the instructional strategies that are suggested by it. The following paper reports the preliminary results of using these strategies in introductory physics courses that emphasize problem solving.

ISSN:0002-9505    

DOI:10.1119/1.16667

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

Overview, Case Study (OCS) Physics is an effort to integrate recent results from physics education research into instruction for introductory university physics courses that emphasize problem solving. Students actively construct a knowledge hierarchy on a foundation of qualitative understanding. They analyze physical processes and problems using methods similar to those used by experienced scientists. Students receive repeated exposure to concepts in a variety of contexts over an extended time interval. Preliminary trials of OCS Physics have produced promising gains in student qualitative understanding, in their ability to solve problems, and in their ability to form and access a knowledge hierarchy.

ISSN:0002-9505    

DOI:10.1119/1.16668

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

In certain frequency ranges a nonlinear damped and driven oscillator will respond asymmetri‐cally even though the potential energy is a single symmetric well. This dynamical symmetry breaking heralds the onset of a period doubling transition to chaos.

ISSN:0002-9505    

DOI:10.1119/1.16669

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

Because of the finite speed of light, the photographic appearance of a relativistic body would not simply show a Lorentz contraction. In its simplest version, this effect provides exercises, accessible to undergraduates, that illustrate concepts of simultaneity and use of the Lorentz transformation. Transformation of light intensity also provides useful exercises and interesting results.

ISSN:0002-9505    

DOI:10.1119/1.16670

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

The problem of a semi‐infinite harmonic chain with the first mass subject to a forced periodic motion is solved exactly. The scattering of a quantum particle by a semi‐infinite Kronig–Penney chain is analyzed analytically. The behavior of extended and localized solutions is analyzed in both problems and many analogies are found between them. Special attention is paid to the asymptotic behavior of localized solutions near the band edges.

ISSN:0002-9505    

DOI:10.1119/1.16671

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP

摘要:

A first approach to nontrivial dispersion relations is presented. Some properties of these relations corresponding to dispersive and/or dissipative phenomena are analyzed by studying the surface waves in a viscous liquid of infinite depth.

ISSN:0002-9505    

DOI:10.1119/1.16672

出版商:American Association of Physics Teachers    

年代:1991

数据来源: AIP