. Wireless charging seems like an incredible new technology - instead of having to plug in your phone or electric toothbrush, you can just put it on top of a base (which is plugged into the wall) and it will charge wirelessly. But in fact the principle behind this technology has been known for over 100 years. Identify which big law that we learned in PHY 212 explains how wireless charging works, and speculate about what you would find if you opened up a wireless charger and looked inside.