The Physics Teacher January 2020


The Physics Teacher

Volume 58 Issue 1, January 2020


A Practical Classroom iPad Shadowgraph System by Bradley Gearhart and Dan MacIsaac.

This month's cover features a shadowgraph image of a warm breath. For details about how to reveal the invisible in such dramatic fashion, see A Practical Classroom iPad Shadowgraph by Bradley Gearhart and Dan MacIsaac.





And the Survey Says..., Figuring Physics, iPhysicsLabsPhysics Challenge for Teachers and Students, Fermi Questions, Talkin' Physics, Technology in the Classroom,   and  Websights.

Letters to the Editor

A large force table by Thomas B. Greenslade Jr. DOI: 10.1119/1.5141958

Erratum for Dan Styer, “Entropy as disorder: History of a misconception,” Phys. Teach. 57, 454–458 (Oct. 2019) by Dan Styer. DOI: 10.1119/1.5141959


Demonstrating the Cosmic Distance Ladder with Cepheids by Jay M. Pasachoff and Jason W. Mativi. DOI: 10.1119/1.5141960

A Practical Classroom iPad Shadowgraph System by Bradley Gearhart and Dan MacIsaac. DOI: 10.1119/1.5141961

Apparatus Named After Our Academic Ancestors – IV by Thomas B. Greenslade Jr. DOI: 10.1119/1.5141962

Flyby Measurement of the Magnetic Field of a Helmholtz Coil with a Smart Cart by Asif Shakur and Benjamin Valliant. DOI: 10.1119/1.5141963

Quantitative Stirling Cycle Measurements: P-V Diagram and Refrigeration by Y. J. Lu, Hiroko Nakahara and J. S. Bobowski. DOI: 10.1119/1.5141965

“Free-Fall Demonstrations” in the High School Laboratory by G. Bozzo. DOI: 10.1119/1.5141966

Too Cool Two – Service Learning and Faculty Engagement in Physics Outreach by Edward Roob III, Robert F. Bouscher, Ethan I. Kleinbaum, David Sederberg and Gabor Csathy. DOI: 10.1119/1.5141967

Extending the Role of Analogies in the Teaching of Physics by Nikolaos Fotou and Ian Abrahams. DOI: 10.1119/1.5141968

From Helicopter to Lighthouse: How My Teaching Aligns with My Parenting by Jennifer A. Williams. DOI: The Physics Teacher 58, 35 (2020);

Cosmic Ray Muons on the Slopes of Mauna Kea by Jesse Goldman, Andrew McNichols and Robert Pipes. DOI: 10.1119/1.5141970

Simple Alpha Particle Detector with an Air Ionization Chamber by Leontýna Brízová, Jan Šlégr and Kamila Vánová. DOI: 10.1119/1.5141971

Two-Dimensional Diffraction Pattern by a Silk Cloth by Ravi Kant Avvari. DOI: 10.1119/1.5141972

Potentially Electric: An E- Textiles Project as a Model for Teaching Electric Potential by Doug Ball and Colby Tofel-Grehl. DOI: 10.1119/1.5141973

A Purely Geometrical Method of Locating a Smartphone Accelerometer by Chris Isaac Larnder. DOI: 10.1119/1.5141974

Replacing Lab Report Grading by Online Lab Quizzes by  Xiong-Skiba, S. Buckner, C. Little and A. Kovalskiy. DOI: 10.1119/1.5141975

What Exactly Are the New Definitions of Kilogram and Other SI Units? by Vjera Lopac and Dario Hrupec. DOI: 10.1119/1.5141976

Teaching an Old Ball New Tricks: Another Look at Energetics, Motion Detectors, and a Bouncing Rubber Ball by David Marasco. DOI: 10.1119/1.5141977

An Inexpensive Semiconducting Device Laboratory: Building a Schottky Barrier Diode by Tom Ekkens. DOI: 10.1119/1.5141978

Finger Paint and Physics: A Simple Demonstration of Circular Motion and Conservation of Energy  by Sarah Phan-Budd. DOI: 10.1119/1.5141979

Volume Measurement and Units by Jane Bray Nelson and Jim Nelson. DOI: 10.1119/1.5141980


Race and Physics Teaching Collection Resource

DNA Science TPT Element

DNA Science Lesson & Digi-Kit

Inspired by an article from The Physics Teacher, this multidisciplinary lesson and digital resource collection is based on How Rosalind Franklin Discovered the Helical Structure of DNA: Experiments in Diffraction (Braun, Tierney, & Schmitzer, 2011). Click the image to access this resource.