by Ann » Wed Jan 29, 2020 4:11 pm
neufer wrote: ↑Wed Jan 29, 2020 2:43 pm
https://en.wikipedia.org/wiki/Dr._Strangelove wrote:
General Buck Turgidson (George C. Scott):
"So let's get going, there's no other choice. God willing, we will prevail, in peace and freedom from fear, and in true health, through the purity and essence of our natural... fluids. God bless you all." And [then Brigadier General Jack D. Ripper (Sterling Hayden)] hung up. [Pause as he realizes the implications of General Ripper's words]
Uh, we're... still trying to figure out the meaning of that last phrase, sir.
Brigadier General Jack D. Strangelove Ripper????
https://en.wikipedia.org/wiki/Color_of_water wrote:
<<While relatively small quantities of water appear to be colorless,
pure water has a slight blue color that becomes a deeper blue as the thickness of the observed sample increases. The blue hue of water is an intrinsic property and is caused by selective absorption and scattering of white light.
The water molecule has three fundamental modes of vibration. Two stretching vibrations of the O-H bonds in the gaseous state of water occur at [infrared frequencies:] v1 = 3650 cm−1 and v3 = 3755 cm−1. Absorption due to these vibrations occurs in the infrared region of the spectrum. The absorption in the visible spectrum is due mainly to the harmonic v1 + 3v3 = 14,318 cm−1, which is equivalent to a wavelength of 698 nm. In liquid state at 20°C these vibrations are red-shifted due to hydrogen bonding, resulting in red absorption at 740 nm, other harmonics such as v1 + 3v3 giving red absorption at 660 nm.
The intrinsic colour of liquid water may be demonstrated by looking at a white light source through a long pipe that is filled with purified water and closed at both ends with a transparent window. The light turquoise blue colour is caused by weak absorption in the red part of the visible spectrum. Absorption intensity decreases markedly with each successive overtone, resulting in very weak absorption for the third overtone. For this reason,
the pipe needs to have a length of a meter or more and the water must be purified by microfiltration to remove any particles that could produce Mie scattering.>>
https://en.wikipedia.org/wiki/Grand_Prismatic_Spring wrote:
<<The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world, after Frying Pan Lake in New Zealand and Boiling Lake in Dominica. Its colors match most of those seen in the rainbow dispersion of white light by an optical prism: red, orange, yellow, green, and blue.
The vivid colors in the spring are the result of microbial mats around the edges of the mineral-rich water. The mats produce colors ranging from green to red; the amount of color in the microbial mats depends on the ratio of chlorophyll to carotenoids and on the temperature gradient in the runoff. In the summer, the mats tend to be orange and red, whereas in the winter the mats are usually dark green.
The center of the pool is sterile due to extreme heat. The deep blue color of the water in the center of the pool results from the intrinsic blue color of water. The effect is strongest in the center of the spring, because of its sterility and depth. The spring is approximately 110 m in diameter and is 50 m deep.>>
APOD Robot wrote: ↑Wed Aug 27, 2014 4:08 am
Explanation: The Milky Way was not created by an evaporating lake. The colorful pool of water, about 10 meters across, is known as
Silex Spring and is located in
Yellowstone National Park in
Wyoming,
USA. Illuminated artificially, the colors are caused by layers of
bacteria that grow in the
hot spring. Steam rises off
the spring, heated by a
magma chamber deep underneath known as the
Yellowstone hotspot. Unrelated and far in the distance, the
central band of our
Milky Way Galaxy arches high overhead, a band lit by billions of stars. The
above picture is a 16-image panorama taken late last month. If the Yellowstone hotspot causes another supervolcanic eruption as it did
640,000 years ago, a
large part of North America would be affected.
Thanks, Art, that's so interesting! Note , however, that
in that other APOD, the steam rising from the pool is not blue.
[quote=neufer post_id=299146 time=1580309012 user_id=124483]
[quote=https://en.wikipedia.org/wiki/Dr._Strangelove]
General Buck Turgidson (George C. Scott): [i]"[b][color=#0000FF]So let's get going, there's no other choice. God willing, we will prevail, in peace and freedom from fear, and in true health, [u]through the purity and essence of our natural... fluids[/u]. God bless you all.[/color][/b]" And [then Brigadier General Jack D. Ripper (Sterling Hayden)] hung up.[/i] [Pause as he realizes the implications of General Ripper's words] [i][b][color=#0000FF]Uh, we're... still trying to figure out the meaning of that last phrase, sir.[/color][/b][/i][/quote][/quote]
[float=left][img2]https://www.battrestadsdel.se/wp-content/uploads/2017/11/50534_image_23116772_1492071177508253_3251411769501798462_o.jpg[/img2][/float]
Brigadier General Jack D. Strangelove Ripper???? :shock:
[quote=https://en.wikipedia.org/wiki/Color_of_water]
<<While relatively small quantities of water appear to be colorless, [b][u][color=#0000FF]pure water has a slight blue color that becomes a deeper blue as the thickness of the observed sample increases.[/color][/u][/b] The blue hue of water is an intrinsic property and is caused by selective absorption and scattering of white light.
[float=right][img3="The water molecule has three fundamental modes of vibration."]https://aemstatic-ww1.azureedge.net/content/dam/bow/print-articles/2014/01/1314BOWberezinF4.jpg[/img3][/float]
[b][color=#0000FF]The water molecule has three fundamental modes of vibration. Two stretching vibrations of the O-H bonds in the gaseous state of water occur at [infrared frequencies:] v[sub]1[/sub] = 3650 cm[sup]−1[/sup] and v[sub]3[/sub] = 3755 cm[sup]−1[/sup]. Absorption due to these vibrations occurs in the infrared region of the spectrum. The absorption in the visible spectrum is due mainly to the harmonic v[sub]1[/sub] + 3v[sub]3[/sub] = 14,318 cm[sup]−1[/sup], which is equivalent to a wavelength of 698 nm. In liquid state at 20°C these vibrations are red-shifted due to hydrogen bonding, resulting in red absorption at 740 nm, other harmonics such as v[sub]1[/sub] + 3v[sub]3[/sub] giving red absorption at 660 nm.[/color][/b]
The intrinsic colour of liquid water may be demonstrated by looking at a white light source through a long pipe that is filled with purified water and closed at both ends with a transparent window. The light turquoise blue colour is caused by weak absorption in the red part of the visible spectrum. Absorption intensity decreases markedly with each successive overtone, resulting in very weak absorption for the third overtone. For this reason, [b][color=#0000FF]the pipe needs to have a length of a meter or more and the water must be purified by microfiltration to remove any particles that could produce Mie scattering.[/color][/b]>>[/quote][quote=https://en.wikipedia.org/wiki/Grand_Prismatic_Spring]
[float=right][img3="The Grand Prismatic Spring"]https://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Grand_prismatic_spring.jpg/1920px-Grand_prismatic_spring.jpg[/img3][/float]
<<The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world, after Frying Pan Lake in New Zealand and Boiling Lake in Dominica. Its colors match most of those seen in the rainbow dispersion of white light by an optical prism: red, orange, yellow, green, and blue.
The vivid colors in the spring are the result of microbial mats around the edges of the mineral-rich water. The mats produce colors ranging from green to red; the amount of color in the microbial mats depends on the ratio of chlorophyll to carotenoids and on the temperature gradient in the runoff. In the summer, the mats tend to be orange and red, whereas in the winter the mats are usually dark green.
[b][color=#0000FF]The center of the pool is sterile due to extreme heat. The deep blue color of the water in the center of the pool results from the intrinsic blue color of water. The effect is strongest in the center of the spring, because of its sterility and depth.[/color][/b] The spring is approximately 110 m in diameter and is 50 m deep.>>[/quote][quote="APOD Robot" post_id=231055 time=1409112514 user_id=128559]
[c][url=http://apod.nasa.gov/apod/ap140827.html][size=135]Milky Way over Yellowstone (2014 August 27)[/size][/url][/c]
[b] Explanation: [/b] The Milky Way was not created by an evaporating lake. The colorful pool of water, about 10 meters across, is known as [url=http://www.nps.gov/features/yell/tours/fountainpaint/silexspring.htm]Silex Spring[/url] and is located in [url=http://www.yellowstone.co/pdfs/ytsummer2011.pdf]Yellowstone National Park[/url] in [url=http://en.wikipedia.org/wiki/Wyoming]Wyoming[/url], [url=http://en.wikipedia.org/wiki/List_of_U.S._states]USA[/url]. Illuminated artificially, the colors are caused by layers of [url=http://oceanservice.noaa.gov/facts/extremophile.html]bacteria[/url] that grow in the [url=https://goo.gl/maps/ZcydY]hot spring[/url]. Steam rises off [url=https://www.youtube.com/watch?v=9jQNg_q-KzY]the spring[/url], heated by a [url=http://en.wikipedia.org/wiki/Yellowstone_Hotspot#mediaviewer/File:Yellowstone_Caldera.svg]magma chamber[/url] deep underneath known as the [url=http://en.wikipedia.org/wiki/Yellowstone_hotspot]Yellowstone hotspot[/url]. Unrelated and far in the distance, the [url=http://apod.nasa.gov/apod/ap110710.html]central band[/url] of our [url=http://www.nasa.gov/mission_pages/GLAST/science/milky_way_galaxy.html]Milky Way Galaxy[/url] arches high overhead, a band lit by billions of stars. The [url=http://re-prop.com/apod/SS-2.jpg]above picture[/url] is a 16-image panorama taken late last month. If the Yellowstone hotspot causes another supervolcanic eruption as it did [url=http://en.wikipedia.org/wiki/Lava_Creek_Tuff]640,000 years ago[/url], a [url=http://en.wikipedia.org/wiki/Lava_Creek_Tuff#mediaviewer/File:LavaCreekTuff.jpg]large part of North America[/url] would be affected.[/quote]
Thanks, Art, that's so interesting! Note , however, that [url=https://apod.nasa.gov/apod/ap140827.html]in that other APOD[/url], the steam rising from the pool is not blue.