Electromagnetism
Electric fields, magnetic fields, and electromagnetic waves
Electric Field
15 Feb 2026
Visualize electric field vectors from point charge configurations.
electromagnetismcoulombelectric field
How Does Lightning Occur?
7 Mar 2018
Charge separation in thunderclouds and the physics of lightning and thunder.
electromagnetismlightningthunderelectrostatics
How Do Magnets Work?
26 Jan 2018
Ferromagnetism, domains, and why only certain elements are magnetic.
electromagnetismmagnetismferromagnetismdomains
How Do Solar Cells Work?
6 Dec 2017
Photovoltaic cells, band gaps, and tandem configurations — sunlight to electricity.
electromagnetismsolar cellsphotovoltaicenergy
What is a P-N Junction?
30 Oct 2017
The fundamental building block of diodes, transistors, solar cells, and LEDs.
electromagnetismsemiconductordiodeelectronics