Question for theoretical physics about gases
kiloVolts wrote:
Black body radiation is only relevant at red hot temperatures or in a
vacuum. In a fluid media like air or water heat is transported by
convection. You must be a newbie to these groups. Don't you remember Dr.
Convection who was the nemesis of the Jim Hansen crowd?
Your confidence is not proportional to your knowledge. Study some
thermodynamics.
wrote in message
...
It is a most basic fact that objects in a room will all reach the same
temperature as the air in a room.
So how does the air transfer the energy to the solid substances such
as metal?
It is not denied that a piece of metal radiates according to Planck's
Blackbody Radiation Law, which describes the distribution of the
energy of the radiation. The total energy radiated from the surface
conforms with the Boltzman Stefan equation.
If the air brings the metal to it's temperature at equilibrium, the
metal will be radiating from it's surface the infrared energy
according to the Boltzman Stefan equation, which for 300K, (81F) is
460Wm-2. So a steel ball with 1 meter surface area will be radiating
this quantity of energy per second. If this quantity of energy is
leaving the surface of the metal at c and in this quantity per second,
the metal must be absorbing this quantity of energy at this rate from
the gases in the air.
A situation could be devised wherein it could be clearly shown that
the energy is not received as radiation from other solid surfaces.
This energy cannot be transmitted to the metal merely by the
collisions or conduction through the air molecules. A quantification
of the energy of the gas molecules and the transfer of energy to the
metal must be achieved in order to have valid theoretical physics of
this most basic of phenomena of physics.
This means the gas molecules are not transparent to the infrared as is
often believed, but are absorbing and radiating the full continous
spectrum of the infrared in the distribution similar to the Planck
Radiation Law. It is only this absorption and emission through the
full spectrum that the quantity of energy being transfered per second
can be achieved which is equivalent to the energy leaving the surface
of the metal.
It is ABSOLUTELY ESSENTIAL to the theory of greenhouse gases, that N2
and O2 are absolutely transparent and non-reactive to infrared
radiation energy. Otherwise, there is no rational that the trace gases
or the very minute changes in concentrations of trace gases can have
such theorized impact upon atmospheric temperatures.
If the theory of greenhouse gases were correct, very great differences
in the temperature of a piece of the metal would occur depending upon
which gases or combination of gases are used in experimentation.
This is certainly not the case. As it stands, there is no valid
theoretical theory of gases which can be shown by experiment to
support the widely held belief in the existence of the property of
'greenhouse' gases.
KD
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