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Would the Apollo Moon astronauts have been frozen then cooked like chicken-in-a-bag - One Star Warrior unveiled - page 28
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Anonymous Coward |
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Note how the transmittance of optical crown glass, not a specialist IR transmitting glass fall away to close to zero at 2.5 micrometers. This corresponds to a temperature 1150 K, longer wavelengths ( colder ) are not transmitted.
K
Quoting: K Hall Yes, but what about the shorter wavelengths? ALL WAVELENGTHS of light transmit energy, and on absorption they create heat energy. You've lost here. All wavelengths of light are capable of producing thermal energy, so glass is transparent to thermal energy. Obviously all of these wavelengths need to be considered. Glass is transparent to most radiation capable of producing thermal energy. Glass is transparent to most wavelengths of infra red radiation. The only difference between infra red and visible spectrum light is that visible spectrum light is shorter wavelength and higher energy, and detectable by the eyes. Gee whiz, you're a  You are hopeless. Yet again you make a blundering mess of things but try to weasel out with more waffle. Here is your claim again for everyone to see. I am now intrigued as to which solid materials ( yes this time not the maths context ) you believe are transparent to Long wave IR.
K
Quoting: K Hall A very limited number of solids are transparent to long wave or far IR. Non of the ( non gaseous ) substances we have talked about are transparent to IR. Which ones do you say are transparent to thermal radiation?
K
Quoting: K Hall A material is considered transparent if it can transmit a percentage of the radiation incident to its surface. When electromagnetic waves are not transmitted through a material, it is called opaque. All materials are one or the other, and most with low atomic mass are transparent to infra red radiation. Plastic, glass and low mass metals are an example.
Quoting: IDW 68841767 Whoa, hang on a minute. Most solids and liquids are opaque to long wavelength IR including window glass, or the glass in your aquarium. Specialist glass used in astronomy or other remote sensing application like fused silica( edit IR application fused silica is transmissive at higher frequencies ) or potassium bromide is transparent. It's not "any IR" we are talking about here is long wavelength IR ( thermal radiation ) So you list of transparent substances includes the semiconductors like silicon, germanium, GAAS plus sapphire and some plastics like PMMA. K A material is considered transparent if it can transmit a percentage of the radiation incident to its surface. When electromagnetic waves are not transmitted through a material, it is called opaque. All materials are one or the other, and most with low atomic mass are transparent to infra red radiation. Plastic, glass and low mass metals are an example.
Quoting: IDW 68841767 Whoa, hang on a minute. Most solids and liquids are opaque to long wavelength IR including window glass, or the glass in your aquarium. K Wrong. Every child knows this is wrong. Why don't you? Get up one morning and sit in the Sun as it comes through a closed window. It makes no difference how far from the window you sit, you can feel the heat of the Sun on your skin. I wonder if you're even real Wrong. Every child knows this is wrong. Why don't you?
Get up one morning and sit in the Sun as it comes through a closed window. It makes no difference how far from the window you sit, you can feel the heat of the Sun on your skin.
I wonder if you're even real
Quoting: IDW 68841767 Brilliant, another one to add to the list. Planck's law shows us for a body at 5800 K the vast majority of the energy is in visible and near IR light. It is this energy being absorbed by your skin that warms you, not the very long wavelength solar IR.  [ link to en.wikipedia.org] K So that's how it goes IDW makes a claim, is shown to be wrong, but doesn't stop just comes up with more wrong to try and say window glass is really transparent to longwave IR, more abuse, more off topic, more posts, more nonesense, that's enough. K
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