Lecture, two hours; laboratory, six hours. Requisites: courses 110A, 115B. Recommended: courses 18L, 126. Experience with computer programming, especially Python, is helpful but not required. Provides hands-on experience in measuring key properties of weak and electromagnetic interactions using cosmic ray muons. Provides exposure to common experimental techniques in particle physics. Overview of standard model, interaction of particles with matter, basic particle detection techniques, introductory probability and statistics, and analysis with Python and ROOT. P/NP or letter grading.