This lecture covers the preparation for the electromagnetism exam, focusing on chapters 1 to 8. Topics include calculating electric fields between point charges, solid spheres, and understanding electrical potential. The instructor provides a mock exam problem to practice. Students are encouraged to solve a previous exam for feedback. Exam conditions and allowed materials are detailed for the written exam. The lecture emphasizes understanding concepts such as vector fields, Coulomb's force, Gauss's law, charge density, and electrical potential. Practical tips for exam success are given, including strategies for partial credit. The session concludes with a discussion on optical phenomena in different media.