It was a typical Wednesday afternoon at the university library, and students were scattered about, studying for their upcoming exams. Among them was a young physics major named Alex, who was determined to ace his course on electromagnetism.

As I imagine it, the story goes like this:

"Welcome, Alex!" they chimed in unison. "We've been expecting you. You see, we've been working on a special project – a machine that can bring physics concepts to life. And we need your help to test it out!"

He found himself standing in a vast, electric field, surrounded by oscillating charges and currents. A wispy figure materialized before him – it was none other than Paul Tipler and Gene Mosca, the authors of the textbook.