Describes a series of laboratory experiments and computer simulations of the motion of electrons in electric and magnetic fields. These experiments, which involve an inexpensive student-built electron gun, study the electron mean free path, magnetic focusing, and other aspects. (Author/HM)

This booklet was prepared for use at workshops conducted by the Junior Academy of the New York Academy of Sciences and the New York Biology Teachers Association, as well as for use in the high school classroom and laboratory as an aid to both teachers and students. Its purpose is to help the beginning science research student in selecting and…