The Theoretical Physicist's Time Travel Dilemma

The fantasy of impressing medieval peasants with modern knowledge crashes into reality faster than a failed particle accelerator experiment. Turns out knowing that electricity exists and actually building a functional generator from scratch are completely different skill sets. Most physicists today could explain quantum chromodynamics in excruciating detail but would struggle to create a simple battery without modern equipment. Pro tip for time travelers: learn basic metallurgy and bring a detailed engineering handbook, or prepare for an awkward sermon on the mount moment when you realize theoretical knowledge doesn't translate to practical medieval applications.