摘要:

Increasing the students’ understanding of the methods of science is often one of the goals of an introductory course in physics for nonscientists. To supplement the examples arising directly from the usual subject matter and to stimulate clearer thought concerning the nature of scientific inquiry, discussion of some subjects which have a surface resemblance to science is proposed. The history of research into extrasensory perception appears to be ideal as such a counterexample, allowing for explicit comparisons which illuminate the subject of methodology in science while maintaining high student interest. Lecture suggestions, including demonstrations, are discussed.

ISSN:0002-9505    

DOI:10.1119/1.10055

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

摘要:

An undergraduate experiment is described which employs a relaxation method for the measurement of the thermal conductivity and specific heat of a metallic sample in the temperature range 0–100°C.

ISSN:0002-9505    

DOI:10.1119/1.9930

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

摘要:

It is pointed out that the definitions of instantaneous and Fourier frequencies of a signal are noncausal and their measurement requires physically unrealizable systems. Some additional definitions of frequency are given that are causal.

ISSN:0002-9505    

DOI:10.1119/1.9931

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

摘要:

The operators −i∇, the translation generators, are related to mass and velocity by a simple argument that determines the form of the Hamiltonian, in terms of the translation generators, along with the Galilei generators, for a nonrelativistic particle. For a relativistic particle, a similar discussion is given for the analogous problem of determining the position operators for an irreducible unitary representation of the Poincaré group, at least well enough to identify the velocity operators and thus identify the momentum.

ISSN:0002-9505    

DOI:10.1119/1.9932

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

摘要:

Some specific difficulties and pitfalls frequently encountered by beginning students in quantum mechanics relating to pure states, mixtures, and polarization are emphasized and clarified.

ISSN:0002-9505    

DOI:10.1119/1.9933

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.9934

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10056

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.9929

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10057

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP

ISSN:0002-9505    

DOI:10.1119/1.10058

出版商:American Association of Physics Teachers    

年代:1975

数据来源: AIP