摘要:

A questionnaire addressed to physics department chairmen and engineering deans in the 213 accredited engineering colleges in the United States and Canada brought replies from 132 institutions. These provided factual information about course requirements and content, and statements of opinion regarding such subjects as the effectiveness of the physics courses and laboratories, the existence of unnecessary duplication in the engineering curriculum, and problems of communication between physics and engineering departments. Replies from selected junior colleges provided information on course content and relations with senior colleges.

ISSN:0002-9505    

DOI:10.1119/1.1986761

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

The use of the Michelson interferometer as a Fourier transform spectrometer is described. Fringe visibility curves are obtained with an electron photomultiplier or silicon photocell, and Fourier transforms of the visibility curves are taken with the aid of a digital computer. Application of the technique is made to the axial mode structure and phenomenon of “hole burning” in He-Ne lasers, to the shape of the mercury green line and sodium yellow lines, and to the Zeeman spectrum of the mercury green lineΔmj = 0transitions.

ISSN:0002-9505    

DOI:10.1119/1.1986762

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

A graphical representation is proposed as a teaching device which can be useful in order to obtain a good intuitive grasp of the physical meaning of the Lorentz transformations. The connection between the time dilation and the desynchronization of clocks is particularly discussed.

ISSN:0002-9505    

DOI:10.1119/1.1986763

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

The distinctions between the notions of conserved current, conserved charge, and flux integral forms for charge are illustrated.

ISSN:0002-9505    

DOI:10.1119/1.1986764

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

This paper is tutorial and discusses how analysis of low-temperature heat capacity data for simpler crystalline solids can be carried out. The lattice heat capacity is considered in relation to the vibrational properties of the solid. Emphasis is given to the physical interpretation of the various derived quantities and to the meaningful limits to which the data can be extended.

ISSN:0002-9505    

DOI:10.1119/1.1986765

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

Einstein's 1911 twin-rod thought experiment is analyzed, and some of its implications for the physical status of length-contraction within the special theory of relativity are examined. Contrary to a widespread view, it is shown that the twin-rod thought experiment does not require that the two rods be travelling at equal speeds (with respect to a given inertial frame K) in order that the experiment serve its intended purpose. Since the equality or inequality of the speeds of the rods will depend upon the criterion of simultaneity adopted within the inertial frames of the special theory, the irrelevance of the speeds of the rods here indicates the synchrony-independence of this length-contraction effect within special relativity.

ISSN:0002-9505    

DOI:10.1119/1.1986766

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

Energy levels and wave functions are obtained for the quantum mechanical, nonrelativistic, hydrogen atom problem for thel = 0case, using the momentum representation. The result for the energy levels is extended to the general case of arbitraryl,using the factorization method.

ISSN:0002-9505    

DOI:10.1119/1.1986767

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

An attempt is made to give a coherent account of the logical essence of the Copenhagen interpretation of quantum theory. The central point is that quantum theory is fundamentally pragmatic, but nonetheless complete. The principal difficulty in understanding quantum theory lies in the fact that its completeness is incompatible with external existence of the space-time continuum of classical physics.

ISSN:0002-9505    

DOI:10.1119/1.1986768

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

Expressions for the Doppler effect are derived without employing any assumption about the phase of a plane wave. It is shown that the invariance of this phase under both the Galilean and the Lorentz transformations is a trivial consequence of the mathematics and, is independent of its association with any physical process.

ISSN:0002-9505    

DOI:10.1119/1.1986769

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP

摘要:

A nonlecture group technique for teaching physics is described and examination results are compared with classes using the lecture technique. It is concluded that there is no panacea for teaching physics but that a smorgasbord of methods will probably give the students the best educational opportunity to achieve.

ISSN:0002-9505    

DOI:10.1119/1.1986770

出版商:American Association of Physics Teachers    

年代:1972

数据来源: AIP