摘要:

An experiment is presented in which elliptically polarized light, produced by a mica phase plate, is analyzed to determine the phase angle difference δ introduced by the plate, as a function of λ, the wavelength of the light. This functional dependence of δ on λ is then compared to the one calculated using the indices of refraction for a mica phase plate.

ISSN:0002-9505    

DOI:10.1119/1.17412

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

摘要:

Philosophical considerations sometimes direct developments in physics. Such influence most frequently operates during the genesis of new fields. The birth of modern cosmology provides clear evidence of the interaction between philosophical issues and the shape and direction of a new physical discipline. Philosophical controversy between E. A. Milne and other astrophysicists, including A. S. Eddington, James Jeans, and H. P. Robertson, directly affected the models, methods, and very nature of cosmological science for future generations. Today’s standard space‐time metric, for example, resulted from responses by Robertson and A. G. Walker to philosophical challenges presented in Milne’s proposals to scrap the very idea of expanding ‘‘space.’’ Analysis of published works, unpublished manuscripts and correspondence, and personal interviews illustrates the role philosophical considerations played in development of this new field in physics.

ISSN:0002-9505    

DOI:10.1119/1.17386

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

摘要:

There has been a current feeling of dissatisfaction in the physics community concerning the content and direction of introductory physics courses. The presented position is that this unease does not originate from the lack of exotic, new physics in introductory courses, but rather from the outdated philosophical picture that these courses paint. Research in the area of fundamental interactions has revealed a natural structure that seems to cover all of physics. This structure is centered on a dynamics nested in the space‐time of relativity. The four fundamental interactions originate from internal symmetries embedded in these dynamics. This is the paradigm that should be the template of present physics courses.  

ISSN:0002-9505    

DOI:10.1119/1.17387

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

摘要:

A noncalculus laboratory experiment using kinetic theory measures the expected difference in the internal energy behavior of gases of various atomic structures. The cost of equipment per lab station is less than $100.

ISSN:0002-9505    

DOI:10.1119/1.17388

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17389

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17390

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17391

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17392

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17393

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.17394

出版商:American Association of Physics Teachers    

年代:1993

数据来源: AIP