If I were you, I'd try to forget it as soon as I can, becouse it's wrong. 2.4 GHz is not in the water absortion band (I'd show you a nice graph, but I can't find one that goes to such low frequencies), a microwave would work as nicely in 1 GHz or 5 GHz, what matters is the H-O bonds, that are esentially electric dipoles and are excited when high-ish frequency and power hits them. You probably have noticed that fat heats much faster than wattr in the microwave oven, that is becouse is full of OH bonds, just as the GP is full of shit[1].

This is one of those moments when I wonder if most of the things I have learned in HN are bullshit, I'm usually struck with awe at the sapience of the HN hivemind too, but in times like this...

[1]https://en.wikipedia.org/wiki/List_of_common_misconceptions#...

I read the title, clicked the link and thought to myself, "alright HN, teach me something about Bluetooth"

The parent comment is exactly the kind of comment I expected and hoped for!