> but it's not because it has lower energy...There is a "window" in the visible light fair enough, I got my physics a bit wrong there, but I was under the impr

> but it's not because it has lower energy...There is a "window" in the visible light fair enough, I got my physics a bit wrong there, but I was under the impression that that window was in the blue/green part of the spectrum since I do know that water is good at blocking UV and even cosmic radiation. I also know that it's good at blocking visible red, because if you go further than about 20-30 feet down on a sunny day and cut yourself, your blood looks green. Is there an additional window in the infrared part of the spectrum that supports GP's point?