*47%*:**A Comparison of Visual Representations of E&M Plane Waves***37%*:**Meanings of the equals sign in upper-level undergraduate problem solving***32%*:**Wave Representations Model***31%*:**Workshop Tutorials for Physics: Waves and Optics - Introductory***31%*:**Upper-Level Physics Studentsâ€™ Conceptions Of Understanding***30%*:**Consistency of students' conceptions of wave propagation: Findings from a conceptual survey in mechanical waves***29%*:**Analogical scaffolding and the learning of abstract ideas in physics: An example from electromagnetic waves***29%*:**An Epistemic Framing Analysis of Upper-Level Physics Students' Use of Mathematics***29%*:**Representation issues: Using mathematics in upper-division physics***28%*:**Ejs Wave Packet Model***28%*:**Analogous Patterns of Student Reasoning Difficulties in Introductory Physics and Upper- Level Quantum Mechanics***28%*:**Student Objections to and Understanding of Non-Cartesian Unit Vector Notation in Upper-Level E&M***27%*:**Waves: An Interactive Tutorial***27%*:**Wave Interference***27%*:**LivePhoto Physics: Wave Pulse Propagation on a Slinky Spring***27%*:**Student difficulties with quantum states while translating state vectors in Dirac notation to wave functions in position and momentum representations***27%*:**The impact of peer interaction on the responses to clicker questions in an upper-level quantum mechanics course***27%*:**Student conceptual resources for understanding mechanical wave propagation***26%*:**The Physics Classroom: Waves**