The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. When sunlight hits ...
You're by the water's edge, observing a turquoise lagoon, then a little further away, you see an almost black sea at the foot of a cliff. Why does the ocean take on such different hues, from deep dark ...
Add Yahoo as a preferred source to see more of our stories on Google. Crater Lake in Oregon looks brilliant blue because its water comes from melting snow and is extremely pure. CST Tami Beduhn, NOAA ...