Radio Wave Attenuation
There are two general types of matter (substances) in the universe that affect electromagnetic waves, conductors and insulators which are called dielectrics by scientists. Most, but not all, conductors are metals, such as copper, aluminum, silver and gold. However, salt water is also a rather poor conductor! Most, but not all, dielectrics are non metals. Examples of dielectrics are paper, plastic, Teflon, glass, ceramic and dry wood. Pure water is a good dielectric substance!
I read this paragraph, and was truly intrigued. Is it really true that salt water (NaCl) passes radio waves (specifically 3cm) through better than pure water? Why is this, and how large is the difference? Would it be noticeable in an experiment?