Lecture
This lecture covers the concepts of electric fields, scalar fields, equipotential lines, and field lines, focusing on the behavior of point charges and dipoles in different scenarios. It also discusses the interaction of matter with electric fields, dielectric materials, induced dipoles, and the polarization of materials. Furthermore, it explores the forces acting on charges in magnetic fields, the motion of charges in uniform magnetic fields, and applications such as mass spectrometry. The instructor presents examples like the Earth's magnetic field and the northern lights to illustrate these concepts.