Hi all, In response to the above question, i read somewhere before that when lightning strikes a pool, or the sea, the current will dissipate along the water surface. The current will penetrate only to a small depth into the water. A simple search on Google throws up the simple explanation "The Skin Effect". Lightning is described as a high frequency Alternating current. Can i have some help to explain - in simple terms - this spreading of current over water surface?In addition, how far on the water surface does the current actually spreads out? Thanks. Physics Forums rock!