Beam Of Light Into A Body Of Water

 

       In these cases we have no physical changes of the water, but the annoying question is WHAT ARE THEY LOOKING FOR? It has been observed may times, so it must have some function. Could this beam serve another purpose? In abductions it’s used to transport people (…beam me up Scotty). Could this be a tool for measuring heat, pollutants, or density of life forms in that particular body of water? Suggestions welcomed.