摘要:

A new, short derivation of the radiation formulas from a homogeneous, field free, nonrelativistic plasma is presented. The nonrelativistic assumptions are emphasized.

ISSN:0002-9505    

DOI:10.1119/1.1976235

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

Planetary perihelion precession is theoretically examined within the framework of special relativity. The Eötvos experiment is used to motivate an assumption that the inertial and gravitational masses have the same velocity dependence. The resultant orbit equation is then approximated by one that is soluble in terms of trigonometric functions, and the accuracy of the approximation is examined. The perihelion advance predicted by the approximate equation is twice that predicted by special relativity without a velocity-dependent gravitational mass. Finally, the behavior of a photon in a gravitational field is investigated in a way consistent with the assumptions of this paper, and the usual values for the gravitational red-shift and light deflection as calculated with special relativity and the postulate of equivalence result.

ISSN:0002-9505    

DOI:10.1119/1.1976236

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

A search coil which is connected to the input of an integrating operational amplifier can be used to measure magnetic fields with an accuracy which varies from 3%–4% at 10 G to 1%– 2% at fields of 1 kG or more. The apparatus is inexpensive, compact, and easy to operate. The method can also be used to study the magnetic properties of paramagnetic and superconducting materials.

ISSN:0002-9505    

DOI:10.1119/1.1976237

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

We have calculated the effective mass of the spring in an oscillating mass-spring system. It varies from4/π2to13the mass of the spring as the suspended mass varies from 0 to ∞. This and the various predicted modes can be easily verified experimentally.

ISSN:0002-9505    

DOI:10.1119/1.1976240

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

摘要:

A matrix method alternative to perturbation method is proposed. The method is applicable even when some of the off-diagonal elements of the Hamiltonian are large, it does not require a nondegenerate “unperturbed Hamiltonian.” The method proposed is not a perturbation theory in the usual sense, since it does not require the interaction potential to be small, and its convergence or lack of convergence can be determined during the course of the calculations, since the method depends on an iterative procedure.

ISSN:0002-9505    

DOI:10.1119/1.1976197

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976199

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976201

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976203

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976205

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.1976207

出版商:American Association of Physics Teachers    

年代:1970

数据来源: AIP