摘要:

The relativistic transformations for the electric and magnetic fields are obtained without mention of test charges or transformation properties of the sources, in a way which is suitable for a beginner’s course. The transformation laws follow from the fact that an electromagnetic plane wave is plane in every inertial reference system.

ISSN:0002-9505    

DOI:10.1119/1.18556

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

The Feynman propagator for the case of a linear potential is evaluated by a variety of means.

ISSN:0002-9505    

DOI:10.1119/1.18550

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

Since 1991, we have been using Alan Van Heuvelen’sOverview, Case Study: Physics(OCS physics) methodology in introductory physics courses at New Jersey Institute of Technology (NJIT) with remarkable success. With the OCS method, physics concepts are presented first, with no mathematics. Only after the concepts are understood is math brought into the picture at the appropriate level. In addition, much of the learning is accomplished with students working together in small groups of three or four. In these collaborative settings, students actively engage each other in the learning process, working on specially designed small group problems, while the instructor acts as a facilitator of the on-going learning. We present various comparisons showing the effectiveness of OCS instruction over traditional teaching. In particular, since the introduction of OCS physics into NJIT’s summer Educational Opportunity Program (EOP), which involves mostly minority students, EOP students have significantly outperformed non-EOP students in their fall physics courses. Interviews with students and observations of videotapes suggest that “second teaching” takes place in small groups following “first teaching” by the instructor. Second teaching is interpreted on the basis of ideas developed by Vygotsky.

ISSN:0002-9505    

DOI:10.1119/1.18552

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

We present a fully covariant solution to the problem of a charged particle in a time-independent, spatially uniform electromagnetic fieldFαβ.No restrictions are imposed on the strengths or orientations of the electric and magnetic fieldsE,B. Our general result is then applied to a few special cases, and the answers are shown to reduce to expressions available in the literature once a specific inertial frame is chosen.

ISSN:0002-9505    

DOI:10.1119/1.18626

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

摘要:

We discuss an alternative classical description of the nonrelativistic scattering process that is completely analogous to the time-independent formalism employed in quantum-mechanics textbooks. This approach provides an elementary introduction to the standard stationary scattering theory, embodying many of its essential concepts.

ISSN:0002-9505    

DOI:10.1119/1.18557

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18573

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18790

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18558

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18559

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18560

出版商:American Association of Physics Teachers    

年代:1997

数据来源: AIP