To add to what others have said, it's a common misunderstanding that water somehow has a peak absorbtion of radio waves at 2.4GHz because microwave ovens use th

To add to what others have said, it's a common misunderstanding that water somehow has a peak absorbtion of radio waves at 2.4GHz because microwave ovens use that frequency. There is, however, nothing special about 2.4 GHz and in general attenuation of radio waves in water increases with frequency.