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Issues
April 2011
ISSN 0002-9505
EISSN 1943-2909
LETTERS TO THE EDITOR
PAPERS
Demonstration of negative refraction of microwaves
Am. J. Phys. 79, 349–352 (2011)
https://doi.org/10.1119/1.3537122
Why do forces add vectorially? A forgotten controversy in the foundations of classical mechanics
Am. J. Phys. 79, 380–388 (2011)
https://doi.org/10.1119/1.3534836
Quantum mechanics of a free particle from properties of the Dirac delta function
Am. J. Phys. 79, 392–394 (2011)
https://doi.org/10.1119/1.3533715
APPARATUS AND DEMONSTRATION NOTES
BOOK REVIEWS
Ergodic Lagrangian dynamics in a superhero universe
I. L. Tregillis, George R. R. Martin
A simple Minkowskian time-travel spacetime
John D. Norton
All objects and some questions
Charles H. Lineweaver, Vihan M. Patel
Kepler's Moon puzzle—A historical context for pinhole imaging
Thomas Quick, Johannes Grebe-Ellis
The surprising subtlety of electrostatic field lines
Kevin Zhou, Tomáš Brauner
An undergraduate lab experiment on matched filtering as used in gravitational wave detection
Michael Daam, Antje Bergmann, et al.