Blue water is pure water?
MDR
water that is apparently so pure that it has a very light blue tint to it.
Maybe this is the reason why icebergs that are several thousands of years
old in the Artic have similar features- a slight blue tint.
Just curious.
Pat Keith
"MDR" <outd...@look.junk.ca> wrote in message
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Johann Snyman
Basically yes.
From:
http://www.serc.si.edu/water_quality/water_quality_html/water.htm
<QUOTE>
Water is blue, because water itself absorbs light, very weakly in the blue
and
green region of the spectrum, from below 400 nm to about 550 nm. However, at
about the 550 nm, absorption begins to increase significantly into the red
region of the spectrum, as can be seen in the graph below.
Most of the energy, though not all, from the wavelengths in the green region
above 550 nm, through the yellow and orange regions to the red wavelengths
at
700 nm, is absorbed. Therefore only the blue and blue-green wavelengths
remain
significantly unabsorbed. The unabsorbed rays of light penetrate deeper into
the water column than any of the absorbed wavelengths, meaning a blue color
reflects back at you when you observe the water.
</QUOTE>
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Gale Pearce
If you saw it in a backyard koi or goldfish pond it is more than likely
"Pond Shade" (a dye) has been added in a small amount for effect
Gale :~)
TurtleSteve
this is wrong. I have no proof but here's what i believe:
although all water is blue due to absorbed light, some water is bluer
than normal due to dissolved air in the water. i don't know how
exactly. it's been reported that some people near here called in 911
because their water was blue when it usually was clear. turns out a new
water filtration plant had been started that works just like a giant
protein skimmer in a reef tank. it uses dissolved air to purify the
water, and the resulting water has lots of dissolved
air/oxygen/whatever. the blue water they saw was water that had come
from the new plant.
--
Steve
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Foes
a greenish blue tint due to the glacier silt run off that keeps them
full.
I used to work in Lake Louise and the tourists would ask why the lake
is that color, i guess some people told them that once a month they
drained the lake and the natives came and painted the bottom that
color ( sorry if that offended anyone) I thought it was funny and fit
this thread.
people also asked where the bears went in the winter
ans= they stayed in the Chateau for the winter
How much does the mountain weigh?
ans = with or without trees!!
On Sat, 10 Nov 2001 19:55:36 GMT, TurtleSteve <turtl...@home.com>
wrote:
Pam & Jake Shanley
pool the H2O is dirty brown/black. After I add the chemicals for balance of
the H2O it turns blue!! Jake
Elizabeth Barrow
the other hand, raw sewage is also blue (just a more opaque type).
Very pretty if you don't smell it. I can tell when the local stream
runoff is picking up sewer overflow when it's blue instead of clear.
(This is a situation the city -Pittsburgh- is working to ahem, clear
up.)
Mbuna
is filtered out by the water so only the blue spectrum passes through it.
Discolored water is because of particulate matter in the water reflecting
light back to you.
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Reefs: http://www.amazon.com/exec/obidos/ASIN/1890087009/petgeeks/A/
Plants: http://www.amazon.com/exec/obidos/ASIN/0967377307/petgeeks/A/
Alan Ruben
news:9tlm9b$ogf$1...@news.chorus.net...
> Water is actually clear. It appears blue because the red spectrum of
light
> is filtered out by the water so only the blue spectrum passes through it.
>
If the water filters out colors and in doing so, appears blue....then it is
blue.
--
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www.clearwaterjournal.com
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Mark B.
an object is whatever visible light it is capableof reflectig back. It
is not defined by what colours it might also happen to filter out.
If you where to put a green object at the bottom of a pool of water,
it would appear green, not cyan (the combination of blue and green),
because that is the only light being returned to you.
Similarly, if you were in a room with only green light, everything
would appear green (or black, if the object did not reflect green
light), but that would not be their actual colour.
"Alan Ruben" <alan...@mediaone.net> wrote in message
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Robert B.
for a tiny little guy in a sailor suit sitting in a boat...
Mark B. <admini...@127.0.0.1> wrote in message
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Adam Weston
because it doesnt reflect red light much? practically speaking, color can
come from reflection or transmission.
If pure water blocks red light, a red object at the bottom of a pool would
appear very dark, since some of the red light would be blocked on the way
down and more would be blocked after being reflected.
I would hazard a guess as to where the blue comes from though. Bubbles or
particles, even single molecules of chemicals, may reflect blue light from
the sky. I'm pretty sure thats what gives the ocean it's color, algae
reflect back the blue of the sky.
As for glaciers (and snow) they are not blue but very white when exposed to
white sunlight. However, the shadows appear blue becuase they reflect
ambient blue sky light.
"Mark B." <admini...@127.0.0.1> wrote in message
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gbomboy
> Certainly glacier water is blue, because of the water properties. On
> the other hand, raw sewage is also blue (just a more opaque type).
> Very pretty if you don't smell it. I can tell when the local stream
> runoff is picking up sewer overflow when it's blue instead of clear.
> (This is a situation the city -Pittsburgh- is working to ahem, clear
> up.)
Are you sure that is not from those toilet cleaner blocks that so many people use ?
Gretchen
Captain Michael Huett
different color, it is because of the impurities in it.
"MDR" <outd...@look.junk.ca> wrote in message
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