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Dec 1953

Volume 21, Issue 9, pp. 659-705

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The Interaction of π Mesons with Atomic Nuclei

Norman C. Francis and Kenneth M. Watson

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 659

Online Publication Date: Jul 2005

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The interactions of π mesons with nuclei are reviewed and interpreted in terms of the Serber model of nuclear reactions at high energies. This involves introducing the concept of a mean free path for both meson scattering and absorption in nuclear matter. These quantities are discussed in relation to the relevant experimental data. A discussion of the “optical model” of nuclear scattering is also included.

Reproductions of Prints, Drawings, and Paintings of Interest in the History of Physics. 56. Four Plates from A Compleat System of Opticks by Robert Smith

E. C. Watson

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 673

Online Publication Date: Jul 2005

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The first application of the method of constructing the image of a point object by means of an unrefracted central ray and a ray which is parallel to the axis and is refracted through the focus was made by Robert Smith. A section of his A Compleat System of Opticks is here reproduced.

The cgs Units of Magnetic Susceptibility and Specific Magnetization

Ernst M. Cohn and Morris Mentser

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 681

Online Publication Date: Jul 2005

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The units of susceptibility and magnetization can be chosen so that they are identical in the (unrationalized) 3- and 4-dimensional cgs systems. These units and the defining equations are given, and inconsistencies in the literature are pointed out. Adoption of the present definitions would eliminate much existing confusion and satisfy the various schools of thought.

Radiation Pressure Against Perfect Reflectors

J. Elmer Rhodes, Jr.

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 683

Online Publication Date: Jul 2005

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The concept of radiation pressure exerted against a reflecting surface by electromagnetic waves and by sound waves in gases is a familiar one. The absence of radiation pressure for sound waves in a “linear medium” is becoming well known. The equations are somewhat different for the radiation pressure for these two cases where the radiation pressure is not zero. The mechanisms usually called on to explain them (nonlinearity of the equation of state of the gas, acceleration of charges in the reflector by the electromagnetic waves) are widely removed from each other. Consequently, it is not evident on the surface whether radiation pressure is a general property of waves or the capricious result of isolated physical phenomena associated with some waves.
A generalized concept of radiation pressure is here developed and then applied to several kinds of waves: sound waves in various media, waves on strings and springs, electromagnetic waves. Also, a simple demonstration of radiation pressure (for waves in a ripple tray) is described.
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The Bohr Formula for Nonrelativistic Elliptic Orbits

Herbert Goldstein

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 688

Online Publication Date: Jul 2005

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The Bragg Method Demonstrated with Sound Waves

George Barnes

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 688

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A Small Scale dc Motor Experiment for the Elementary Laboratory

Grover C. Baker and George E. Bradley

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 689 | Cited 1 time

Online Publication Date: Jul 2005

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Physics in Negro Colleges—A Progress Report

D. A. Edwards

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 691

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A Modified Barlow's Wheel

Harald C. Jensen

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 692

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Elimination of Variables in the Biot Equation

W. W. Sleator

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 692

Online Publication Date: Jul 2005

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Particle Properties of Radiant Energy in Wave Guides

Walter R. Raudorf

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 693

Online Publication Date: Jul 2005

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Clarification of Some Elementary Concepts in Electricity and Magnetism

Irving Stein

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 693

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Selected Science Teaching Ideas of 1952

R. Will Burnett, Editor and Alexander Efron, Reviewer

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 695

Online Publication Date: Jul 2005

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Principles of Modern Acoustics

George W. Swenson, Jr., Author and Isadore Rudnick, Reviewer

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 695

Online Publication Date: Jul 2005

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Introduction to Geometrical and Physical Optics

Joseph Morgan, Author and Richard Hanau, Reviewer

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 696

Online Publication Date: Jul 2005

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Photoelectric Tubes

A. Sommer, Author and Albert S. Eisenstein, Reviewer

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 697

Online Publication Date: Jul 2005

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Physics for Science and Engineering Students

W. H. Furry, Author, E. M. Purcell, Author, J. C. Street, Author, and E. N. Jensen, Reviewer

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 697

Online Publication Date: Jul 2005

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Practical Aids for Teachers of Physics

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 703

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Improvisations

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 703

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Chesapeake Section

J. Ross Heverly

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 704

Online Publication Date: Jul 2005

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Chesapeake Section

J. Ross Heverly

American Journal of Physics -- December 1953 -- Volume 21, Issue 9, pp. 704

Online Publication Date: Jul 2005

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Abstract Unavailable
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