摘要:

The radiation from a uniformly accelerated charge is calculated by transformation of the covariant field tensor with the use of a transformation law which is designed to preserve the velocity of light in the accelerated frame. Both the accelerated charge as seen by a resting observer and a charge at rest as seen by a uniformly accelerated observer are shown to exhibit radiation under these conditions.

ISSN:0002-9505    

DOI:10.1119/1.1976159

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The uniform electric field approximation of parallel plates with guard rings is well recognized. However, near corners a high electric field exists in some circumstances, and it can give rise to electron or ion emission. A theoretical study of this field intensity, for example, shows that for a 10-mm electrode separation, 2-mm gap between an electrode and a guard ring, and a 0.005-mm corner radius, the electric field is as high as 5.4 times the uniform field found between infinite plane electrodes.

ISSN:0002-9505    

DOI:10.1119/1.1976161

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

This is a straightforward discourse that starts with a radio antenna and winds up with the propagator for Dirac particles. From the radio antenna we obtain the physical idea of a propagator and show its nature for Klein-Gordon particles (with photons as a special case). Then, from the Klein-Gordon propagator we easily obtain the propagator for Dirac particles, merely by imposing what might be called the “Dirac condition.” We hope the approach has simplicity and physical appeal.

ISSN:0002-9505    

DOI:10.1119/1.1976163

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

The primary purpose of this paper is to show that, when relativity must be taken into account, there is no need to revise the ordinary definition of a cross section. Rather, a slight rearrangement of factors will obtain Lorentz invariant quantities. To demonstrate invariance is quite simple. Next, the reaction rate density can easily be written down just by bringing together, from a particle viewpoint, the various factors we know on physical grounds should be present. Again, by judicious grouping, the result can be expressed as a product of factors that are separately invariant. We go on to discuss the Lorentz transformation of an angular distribution (without explicitly using the Lorentz transformation equations), the relativistic normalization of wave functions, and finally, the connection of our simple approach withS-matrix theory.

ISSN:0002-9505    

DOI:10.1119/1.1976165

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976169

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976171

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976173

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976175

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976177

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976179

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP