ISSN:0002-9505    

DOI:10.1119/1.18277

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18227

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18228

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18229

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18230

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18169

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18232

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.18233

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

摘要:

The subject of quantum electrodynamics (QED) was the subject ofQED—TheStrangeTheoryofLightandMatter, the popular book by Richard Feynman which was published by Princeton University Press in 1985. On p. 1, Feynman makes passing reference to the fact that the book is based on a series of general lectures on QED which were, however, first delivered in New Zealand. At Auckland University, these lectures were delivered in 1979, as the Sir Douglas Robb lectures, and videotapes of the lectures are held by the Auckland University Physics Department. We have carried out a detailed examination of these videotapes, and we discuss here the major differences between the original Auckland lectures and the published version. We use selected quotations from the lectures to show that the original lectures provide additional insight into Feynman’s character, and have great educational value.

ISSN:0002-9505    

DOI:10.1119/1.18234

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP

摘要:

We present direct tests of the Biot–Savart law to distances of 15 m. This undergraduate experiment involves an audio‐frequency signal generator, magnetic coils, and a lock‐in amplifier. The major experimental difficulty was geophysical magnetic fields resulting from induced eddy currents. The Biot–Savart law was confirmed to a precision of about 1%.

ISSN:0002-9505    

DOI:10.1119/1.18235

出版商:American Association of Physics Teachers    

年代:1996

数据来源: AIP