In article ,
Franz Heymann wrote:

[On reradiation]
No, what I mean is surface heating. This is the effect by which the
surface of an object can become much hotter than either the body of
the object or the air temperature.

Which of the objects under the glass will receive more reradiated heat
from neighbouring bodies than others?

Those that are an approximation to a focus of the glass structure.

Are you remembering that the body you have chosen to receive
reradiated heat is itself also reradiating?

Of course.

Surely as time passes, all the objects in the enclosure will try to
achieve the same temperature?

Er, no. That is FAR too simplistic a model. Remember that there
is an external source of energy, and therefore the most elementary
steady state calculations do not apply.

One point is that glass reflects
long (far) wavelength infrared well,

That is not true. It absorbs infrared radiation.

Please go and look it up. The greenhouse effect is precisely that
the short wavelength infrared emitted by the sun is transmitted,
but the long infrared emitted by the earth is reflected. Yes,
they are both absorbed, too, but everything is relative.


Regards,
Nick Maclaren.