Electricity, magnetism and optics (e&m&o) are the subjects here; ideas of vector fields and plane waves form the conceptual framework. You will discover that plenty of abstract thinking is needed, including liberal use of vector calculus, which will culminate in Maxwell's equations for the electromagnetic field. You'll need to think in 3d, often with time dependence too. In both theory and application, lab work will shed light on the subtleties of these technologically vital sciences.
Because of the small class size and relatively advanced level of discussion, I encourage questions about the material in class, in what might at times seem to be seminar style give-and-take. In other words, engage the material and work hard at using the class to develop your understanding! I thank you in advance for your efforts.