Microwaving Water

Saw this driving around today and “microwaving water” was the first thing that popped into my head.

Before anyone puts on their tinfoil hat and starts to cry about the cell phone companies microwaving water — no, these antennas are not actually microwaving water. First off, in the US, the GSM Frequency Band is approximately 900 MHz. Divide the speed of light (3e8 meters/second) by 900 MHz and you get 0.333… meters (repeating of course), which is about one foot — far larger than a microwave. So no, these antennas aren’t actually microwaving the water supply. Those are radio frequency antennas and the wavelength is just too large compared to a water molecule.