Question.... (rock, cd, beatles, John Lennon, American)

DontRunMeOver · 06-15-2006, 02:13 AM

Quote:

Originally Posted by rudgrljungalist

Could it have anything to do with the direction our earth rotates in? (left and right being east and west tho maybe not in that order?) And how can we say the sky is blue because the ocean is. The ocean is not really blue, it just appears that way. And people say things like "Water looks blue because it reflects the sky" so which one is iit? Is this some weird science-y thing about how we only see green and photosynthesis... I am a bit confused. And about the freezer-drink thing, it is partially to do with the glass as a concuctor of temperature. The liquid contained within is not exposed the same way the bottle is, and when the container is sealed it is harder for the temperature of the liquid to reach the same temp. as its surrounding. If it were uncovered or in something like aluminum, the liquid would likely freeze/cool faster b/c aluminum has a different density, which conducts temperature poorly (unless insulated by glass or something else) Water probably freezes faster that juice, maybe b/c it is purer and has no additives (some, but not like other stuff). Ok, I'm finished w the science lesson. I'm probably only half-correct neway : )

If something looks blue then it is blue. Water absorbs more a lot more red and bit more green light than blue light, which means that when the sun's light goes through it more blue light is allowed to continue, while red and green light are absorbed by the water molecules (check out the pure H20 part on this graph, blue light is 400-500nm). As a result, deep water looks a dark greeny-blue colour.

In tropical areas, some shallow waters appear bluer because of some kind of impurity in the water - a metal or a type of organism, I can't remember which. The same kind of thing happens in caves and rockpools some of the time.

And the sky is blue mainly because of ozone, which has a strong blue colour.

What was the freezer-juice thing? Any impurities in water will lower its freezing point, because things like citric acid and sugar disrupt the hydrogen bonds which hold the ice structure together, so the molecules can move about more easily as a liquid phase.

Science lesson over!