July 2016 Issue, Volume 84, No. 7
This month's cover image is from the featured paper, Optical interference with digital holograms by David Gossman, Benjamin Perez-Garcia, Raul I. Hernandez-Aranda, and Andrew Forbes. DOI: 10.1119/1.4948604
In 1804, Thomas Young reported the observation of fringes in the intensity of light, and attributed it to the concept of interference between coherent sources. In this paper, we revisit this famous experiment and show how it can easily be demonstrated with digital holography. We look closely at the concept of interference with light and ask, “fringes in what?” We then show that depending on how light interferes, fringe patterns in observables other than intensity can be seen. We explain this conceptually and demonstrate it experimentally. We provide a holistic approach to the topic, aided by modern laboratory practices for a straightforward demonstration of the underlying physics.
Resource Letter QI-1: Quantum Information by Frederick W. Strauch.
PHYSICS EDUCATION RESEARCH
Effects of reducing scaffolding in an undergraduate electronics lab by Evan Halstead. DOI: 10.1119/1.4945347
APPARATUS AND DEMONSTRATION NOTES
Phase-sensitive detection in the undergraduate lab using a low-cost microcontroller by K. D. Schultz. DOI: 10.1119/1.4953341
Letters to the EditorRichard Feynman and Bell's Theorem by Andrew Whitaker. DOI: 10.1119/1.4948268
Contemporary Physics in Textbooks by Jay M. Pasachoff. DOI: 10.1119/1.49483164
In celebration of the 100th Anniversary of Einstein's Theory of General Relativity, AAPT created a collection of articles previously published in AJP and TPT. If you missed it earlier in the year, you can still enjoy it.