Because up is colder. On Sat, Mar 16, 2013 at 12:11 PM, Harry Veeder <hveeder...@gmail.com> wrote:
> So why is the surface preferentially emitting radiation in the up > direction? > > As an aside, I would like to remark that it is possible to invent > models which work according to the laws of physics which predict the > measured behaviour of a given system. However, upon reflection and > further study the model may posses characteristics which do not > actually correspond to the system being study. > > Harry > > On Sat, Mar 16, 2013 at 2:37 PM, Alexander Hollins > <alexander.holl...@gmail.com> wrote: > > yes, because the feathers let heat flow internally. the heat is all > leaving > > in the up direction. > > > > On Sat, Mar 16, 2013 at 11:11 AM, Harry Veeder <hveeder...@gmail.com> > wrote: > >> > >> here is the paper > >> http://www.ipev.fr/pages/bio%20lettersl > >> > >> the back and sides of the peguin are cooler too. > >> > >> Harry > >> > >> On Sat, Mar 16, 2013 at 2:04 PM, Alexander Hollins > >> <alexander.holl...@gmail.com> wrote: > >> > wear a well insulated jacket outside at night someplace cold (no > clouds) > >> > for > >> > a couple of hours. Feel the shoulders of the jacket. They will be > colder > >> > than the sides. Same thing. your "outer shell" becomes colder than the > >> > surrounding air. > >> > > >> > > >> > On Sat, Mar 16, 2013 at 10:22 AM, Harry Veeder <hveeder...@gmail.com> > >> > wrote: > >> >> > >> >> Does the explanation make sense to you? > >> >> harry > >> >> > >> >> Emperor penguin body surfaces cool below air temperature > >> >> > >> >> http://royalsociety.org/news/2013/cool-penguins/ > >> >> > >> >> Harry > >> >> > >> > > >> > > > >
