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Super heated steam colour 1
- Thread starter baasi
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Likewise, we can't see most of the gases in the atmosphere, which are essentially superheated as well.
[edit] although, the sky is somewhat blue from a scattering phenomenon that affects the shorter wavelengths more than the longer ones. Attached is graph of atmospheric radiance looking down from orbit. GRND_RFLT is the what the ground reflects, DRCT_RFLT is the directly sun-illuminated reflection from the ground. The difference is the reflection of the scattered light in the atmosphere. TOTAL_RAD is the total radiance of the path, which includes ground reflected light as well as the scattered light in the path.
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[edit] although, the sky is somewhat blue from a scattering phenomenon that affects the shorter wavelengths more than the longer ones. Attached is graph of atmospheric radiance looking down from orbit. GRND_RFLT is the what the ground reflects, DRCT_RFLT is the directly sun-illuminated reflection from the ground. The difference is the reflection of the scattered light in the atmosphere. TOTAL_RAD is the total radiance of the path, which includes ground reflected light as well as the scattered light in the path.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
racookpe1978
Nuclear
Well, pure water is colorless, so it'd be hard to make a case that its individual gas molecules "should be" visible.
Actually, pure water isn't colorless, it's a bit on the blue-green side, as evidenced by is absorption spectrum. This is one reason that laser mine detection systems use blue-green lasers
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
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racookpe1978
Nuclear
Yeah. Always cats and dogs and rabid hedgehogs trying to mate with skunks, when you want cute Guinea pigs and cuddly rabbits. 8<)
Each Water droplet will reflect light which make you see steam from a steam kettle. In the superheated region we no longer have droplets as we have vapor whose water molecules, I suspect, are smaller than the visible light wavelength in any spectrum, therefore, there is no reflection and no visibility of superheated steam. That's what I think, am I off base on this?
Steam is the gaseous phase of water, and is essentially colorless.
The white cloud emitted from a steam engine is droplets of water, same as in clouds (sometimes ice crystals for very high clouds).
Even lots of steam engine fans do not know this!
I tell people that our engines emit zillions of rainbows. There's romance for you.
I do not know if saturated steam is colored, never looked closely...
The white cloud emitted from a steam engine is droplets of water, same as in clouds (sometimes ice crystals for very high clouds).
Even lots of steam engine fans do not know this!
I tell people that our engines emit zillions of rainbows. There's romance for you.
I do not know if saturated steam is colored, never looked closely...
georgeverghese
Chemical
Interesting. If liquid water is colorless, and pure water vapor is colorless, why is condensing steam white? From IRStuff's post, it seems liquid water color should be the net result when you remove blue - green from plain colorless light, which is ...?
EdStainless
Materials
Saturated steam isn't white, it is reflection that result is seeing it as white, it still has almost no color of it's own.
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