Radiation trapping in 1D using the Markov chain formalism: A computational physics project

Radio interferometry

Random Walk with Shrinking Steps

Ranking Tasks for Assessing Conceptual and Quantitative Understanding in Astronomy

Rayleigh-Sommerfeld Fraunhofer Diffraction

Reaction Time of a Group of Physics Students

Real Time Relativity

Real Time Relativity: exploration learning of special relativity

Real-world ballistics: A dropped bucket

Realizing a New Research Agenda for Writing-to-Learn: Embedding Process in Context

Recent developments in optical astronomy

Recent developments in radioastronomy. II

Recent developments in x-ray astronomy

Recognition of paper samples by correlation of their speckle patterns

Refined Characterization of Student Perspectives on Quantum Physics

Reflection of light from a moving mirror: derivation of the relativistic Doppler formula without Lorentz transformations

Reforming a large lecture modern physics course for engineering majors using a PER-based design

Regional Centres for Space Science and Technology Education (Affiliated to the United Nations)

Reinventing College Physics for Biologists: Explicating an epistemological curriculum

Relativistic Electron Experiment for the Undergraduate Laboratory