ISSN:0002-9505    

DOI:10.1119/1.11662

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.11684

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

A review is given of the developments in S‐matrix theory over the past five years which have made it possible to derive results characteristic of quark models without any need to postulate the existence of physical quarks. In the new approach, the quark patterns emerge as a consequence of combining the general S‐matrix principles with the additional concept of order.

ISSN:0002-9505    

DOI:10.1119/1.11653

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

We describe a program which was prompted by and designed to satisfy the modern needs of architects who will be confronted more and more with the constraints imposed by the principles of physics, particularly those relating to energy. The program is designed to make clear, through lectures and laboratory investigations, the relationship between concepts in physics and practice in architecture. It is designed to help the student of architecture recognize that the behavior of a structure is as much a part of his creativity as the structure itself. Experiments range from individual labortory experiments to group around‐the‐campus experiments.

ISSN:0002-9505    

DOI:10.1119/1.11658

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

It is shown how all‐pass filter sytems can be used in labortory experiments in the physics and psychophysics of sound and music. Particular applications include studies of the following: (i) lateralization of sounds in headphone listening; (ii) the spectral modifications produced by phasers, compared with admixing a time‐delayed signal; (iii) the pitch that can be obtained by dichotic processing of two spectrally flat noise signals, Huggins effect; and (iv) the perception of the dephasing of harmonics in complex tone. Some of the effects obtained from experiments on lateralization and on the Huggins effect appear to be new results.

ISSN:0002-9505    

DOI:10.1119/1.11659

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

The Galilean transformation carries one inertial frame into another with a different velocity. The extended Galilean transformation carries an inertial frame into a rigid frame with uniform spatial, but arbitrary translational acceleration x′=x+ξ (t). Besides being useful in discussing the equivalence principle, this transformation provides a physical interpretation for the theorem in nonrelativistic quantum mechanics, that we cannot coherently combine states of different mass. This restriction comes about because we cannot distinguish between coordinate and proper time in nonrelativistic physics.

ISSN:0002-9505    

DOI:10.1119/1.11660

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

A comparison of classical and quantum uncertainties is presented for the particle‐in‐a‐box, the harmonic oscillator, and the one‐electron atom. It is found that the quantum results reduce to the classical in the limit of either very large quantum numbers orh→0. A classical uncertainty principle is derived and compared with its quantum analogue. A possible relationship between zero‐point motion and the uncertainty principle is noted.

ISSN:0002-9505    

DOI:10.1119/1.11661

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

Physical Measurements 1 is a measurement oriented basic physics laboratory course required of all sophomore students at the Colorado School of Mines. The course is intended to introduce students to the principles of measurement theory at a higher level than is common in an elementary physics lab. The subjects of error analysis, graphing, least‐squares analysis, experimental design, measuring instruments, and report writing are covered in a 1‐h/week lecture session. Experiments from mechanics and electricity and magnetism, that illustrate equally the principles of measurement theory and the principles of physics, are performed in 2‐h/week laboratory sessions. A workbook entitledConceptsofPhysicalMeasurementserves both as a textbook in measurement theory and a laboratory notebook.

ISSN:0002-9505    

DOI:10.1119/1.11691

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

A simplified relativistic force transformation equation is derived and then used to obtain the equation for the electromagnetic force on a charged particle, calculate the electromagnetic fields due to a point charge with constant velocity, transform electromagnetic fields in general, derive the Biot‐Savart law, and show that the constant of proportionality in Coulomb’s law is equal to the speed of light squared times the constant of proportionality in the Biot‐Savart law. All is done with simple vector algebra without using four vectors, tensors, or Maxwell’s equations. The simplification results from the fact that when one takes the usual force transformation law: F′=A(U)F, and rewrites it using the inverse transformation matrix, as F=A−1(U)F′, the resulting expression is more simple becauseA−1(U) is linear in the velocity, U butA(U) is not.

ISSN:0002-9505    

DOI:10.1119/1.11692

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP

摘要:

The pedagogical and research advantages of an advanced laboratory‐research course for nonphysicists taught by physicists are discussed. The practical considerations which determine the structure and content of such a course are emphasized with particular attention given to those features which would be most helpful to others contemplating a similar course. A successful example of such a course developed by the authors is discussed in detail.

ISSN:0002-9505    

DOI:10.1119/1.11693

出版商:American Association of Physics Teachers    

年代:1979

数据来源: AIP