Physics 111 Advanced Laboratory. Professor Sumner Davis This video accompanies the Compton Scattering Experiment, providing students with an introduction to the theory, apparatus, and procedures. When photons collide with electrons they give up energy, their wavelengths are increased, and they are scattered out of their original direction of travel. This phenomenon is the Compton Effect, described with an equation relating energy loss to scattering angle. In this experiment gamma rays from radioactive Americium are scattered by electrons in a target of aluminum. You will measure energy loss vs. angle to confirm the classical equation and the Klein-Nishina distribution. The experiment offers an introduction to gamma ray detection and measurement, with emphasis on semiconductor detectors. You will learn how to use a pulse height analyzer, and how to work safely around radioactive materials. http://advancedlab.org

General Biology Laboratory

Computer Science 61A, 001 - Spring 2014 Creative Commons 3.0: Attribution-NonCommercial-NoDerivs

CS 61A - Spring 08 - The Structure and Interpretation of Computer Programs Instructor Brian Harvey Introduction to programming and computer science. This course exposes students to techniques of abstraction at several levels: (a) within a programming language, using higher-order functions, manifest types, data-directed programming, and message-passing; (b) between programming languages, using functional and rule-based languages as examples. It also relates these techniques to the practical problems of implementation of languages and algorithms on a von Neumann machine. There are several significant programming projects, programmed in a dialect of the LISP language. http://www.cs.berkeley.edu