We'll talk about three big ideas: electric potential difference (voltage), electric current, and electric field. Yes, they are all related, and I will show you how with some water and an LED.

Planar wetting films of isotropic oil under LC are quickly transformed into long-lived emulsions using a 10-Hz electric field. Credit: Nature (2025). DOI: 10.1038/s41586-025-09279-2 ...