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Volume 31

Issue 12 | Dec 1963 | pp. 897-948

Issue 11 | Nov 1963 | pp. 819-895

Issue 10 | Oct 1963 | pp. 747-817

Issue 9 | Sep 1963 | pp. xi-745

Issue 8 | Aug 1963 | pp. 565-689

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Select this Article		Resource Letter F-1 on Friction Ernest Rabinowicz American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 897 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract Prepared at the request of the AAPT Committee on Resource Letters; supported by a grant from the National Science Foundation. This is one of a series of Resource Letters on different topics, intended to guide college physicists to some of the literature and other teaching aids that may help them improve course contents in specified fields of physics. No Resource Letter is meant to be exhaustive and complete; in time there may be more than one letter on some of the main subjects of interest. Comments and suggestions concerning the content and arrangement of letters as well as suggestions for future topics will be welcomed. Please send such communications to Professor Arnold Arons, Chairman Resource Letter Committee, Department of Physics, Amherst College, Amherst, Massachusetts. Notation: The letter E after an item number indicates elementary level, useful principally for freshman liberal arts through sophomore physics courses; the letter I indicates intermediate (junior, senior) level; and the letter A indicates advanced material principally suited for senior graduate study. An asterisk (∗) indicates items particularly recommended for introductory study. Additional copies: Available from American Institute of Physics, 335 East 45 Street, New York 17, New York. When ordering, request Resource Letter F-1 and enclose a stamped return envelope.

Select this Article		Resonant Detection of Light Pressure by a Torsion Pendulum in Air—An Experiment for Underclass Laboratories Robert E. Pollock American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 901 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract A mirror suspended by a torsion fiber in air may be driven at resonance by the force from an interrupted light beam to reach a detectable oscillation amplitude. The radiometer forces which compete with the true light force may be separated experimentally. The method was tested as a laboratory experiment by a small freshman class and proved to be workable and interesting to the students. The concrete experience with damped simple-harmonic motion and with small-signal detection techniques as well as the simplicity of the apparatus enhance the interest of this project as a teaching experiment.

Select this Article		Electron Velocity Distributions in Gases Joseph C. Bowe American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 905 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract An analytical expression for the velocity-distribution function for the low-energy region (u < u₁) is obtained from the Maxwell-Boltzmann transport equation on the assumption that inelastic collisions occur at u = u₁. The exact linear differential equation that defines the distribution function in the high-energy (u > u₁) region is also derived. The mathematical difficulties and the usual approximations that are associated with this equation are briefly examined. An approximate analytical solution is given in terms of Hankel functions of the first kind when the cross section for inelastic collisions is assumed to be proportional to (u − u₁)^γ. The theory, which is developed in an elementary formalism, applies to electrons that are in a uniform dc electric field. Physical interpretations and the effects of inelastic collisions are emphasized.

Select this Article		A Classical Analog for Relativistic Contraction Lewis Epstein American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 913 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract It is possible to construct a mechanical model which demonstrates the Fitzgerald contraction. An equation is derived to describe the shape of a dimple moving across an elastic membrane, clearly showing the analogy to the field of a point charge in free space, including the relativistic contraction in the direction of motion. This model should suggest some reason to the inquiring mind that persists in wondering—“what really makes it shrink”.

Select this Article		A Laboratory Linear Analog for Lattice Dynamics R. B. Runk, J. L. Stull, and O. L. Anderson American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 915 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract The application of the linear air track, a laboratory demonstration apparatus, is extended to demonstrate theorems in lattice dynamics. As a one-dimensional model it, visually and quantitatively, reveals details of the frequency versus wavenumber diagram, in particular the various modes of vibration, dispersion, phase velocity, the separation between the acoustic and optic branches, and the frequency spectrum.

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Dec 1963

Volume 31, Issue 12, pp. 897-948

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Select this Article		Use of an Oscilloscope to Measure Wave and Group Velocity Frank Oppenheimer, Editor American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. xiii Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Forced Harmonic Oscillator Frank Oppenheimer, Editor American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. xiii Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Elastic Collisions in an Air Trough Frank Oppenheimer, Editor American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. xiv Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Measurement of the Spacing of Multiple-Slit Diffraction Patterns Frank Oppenheimer, Editor American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. xiv Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Steam Trap Spheres Frank Oppenheimer, Editor American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. xiv Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		An Inexpensive Optical-Lever Amplifier for Studying the Brownian Motion of a Galvanometer K. S. White American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 922 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract A simple optical-lever amplifier constructed from components normally available in a university physics department is described. The design was based on one by Jones, but was modified so that it could be built by a final-year undergraduate. The amplifier was used to study the Brownian motion of a galvanometer. From this study, the value of Boltzmann's constant k was found to be (1.46±0.1) × 10⁻²³J^°K⁻¹, the accepted value being 1.38 × 10⁻²³J^°K⁻¹.

Select this Article		Electromagnetic Levitator Harvey E. White and Hans Weltin American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 925 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract This paper describes the construction of an electromagnetic levitator whose small size makes possible the use of easily obtainable surplus capacitors, and puts the levitator within the skill and the budget of even a modest physics department shop.

Select this Article		A Laboratory Experiment on the Kinetic Theory of Gases Frank L. Weichman American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 930 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract An apparatus is described which can be used to demonstrate that the heat conductivity of a gas is independent of gas pressure over wide limits as predicted by kinetic theory. The role played by the mass of the molecules and the mean free path can also be demonstrated.

Select this Article		Poor Man's Mass Spectrometer John W. Dewdney American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 932 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract A mass spectrometer has been designed around simple constituents: the vacuum system is made from copper plumbing parts; electrical leads into the vacuum are via darning needles pushed through rubber stoppers; the filament of the thermal ionization source is from a small light bulb; object and image slits are made from bits of razor blades sandwiched between brass washers. The magnetic field is supplied by a permanent magnet fitted with homemade cylindrical pole pieces (of such a diameter to give second-order direction focusing). A modest vacuum of 10⁻⁴ mm Hg is required. When the instrument is focused (by adjusting the position of the pole pieces) and aligned (by rotating greased rubber stoppers) a resolving power of 50 can be obtained.

Select this Article		Undergraduate Experiment on Elasticity of Rubber Bands Emmanuel P. Papadakis American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 938 Online Publication Date: Jul 2005 Full Text: \| Download PDF
	+ -	Show Abstract An experiment on the measurement of the elastic modulus of rubber is described. Both static and dynamic methods are used; the elastic modulus is found to be a function of strain and frequency. The experiment is useful since it illustrates several physical principles, introduces the student to deviations from Hooke's including relaxations, and costs very little.

Select this Article		Notes on Two Optical Aberration Problems Eric J. Irons American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 940 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Measurement of the Velocity of Sound in Gases H. J. Wintle American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 942 \| Cited 1 time Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Extension of Archimedes' Reasoning J. A. Van den Akker American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 943 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Textbooks and Significant Figures John Hart American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 944 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		The Heisenberg Uncertainty Principle Arthur L. Loeb American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 945 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		A Spectroscopic Sodium Flame Noojin Walker, Jr. American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 945 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Regional Sections of AAPT An Editorial Mario Iona American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 945 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Noise and Fluctuations D. K. C. MacDonald, Author and E. T. Jaynes, Reviewer American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 946 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Absorption Spectroscopy Robert P. Bauman, Author and C. Harrison Dwight, Reviewer American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 946 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Introduction to University Physics, Volume One Joseph Morgan, Author and Russell K. Rickert, Reviewer American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 947 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable

Select this Article		Theories of Electrons in Molecules W. T. Simpson, Author and R. C. Whitten, Reviewer American Journal of Physics -- December 1963 -- Volume 31, Issue 12, pp. 947 Online Publication Date: Jul 2005 Full Text: \| Download PDF
		Abstract Unavailable