Archived posting to the Leica Users Group, 2012/04/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Nature is amazing to me. Living out here on the farm, I'm learning more than I ever did in school! Tina Fri, Apr 13, 2012 at 6:33 PM, Herbert Kanner <kanner at acm.org> wrote: > > > Tine, > > The bright colors on a hummingbird are created by iridescence, a fancy > word for what in physics is known as "interference colors". It is the same > phenomenon as the colors you see from a thin film of oil on water. The > slight motion of the throat as the bird breathes will change the angle of > throat surface relative to the direction of the incident light and that is > enough to make the color disappear. > > Herb > > > PESO: >> >> A tiny hummingbird flew into my kitchen and could not figure out how to >> get >> out. He finally knocked himself senseless against the window and I was >> able to pick him up and take him to the porch where he eventually >> recovered >> and flew away. In the meantime, I got a few photos. I never knew they >> could turn the red on their throats on and off! It pulsed from red to >> black while I watched. >> >> http://www.pbase.com/**tinamanley/peso_2012&page=5<http://www.pbase.com/tinamanley/peso_2012&page=5> >> >> Which, if any, do you like? >> >> Tina >> >> -- >> Tina Manley, ASMP >> www.tinamanley.com >> >> ______________________________**_________________ >> Leica Users Group. >> See >> http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >> more information >> > > -- > Herbert Kanner > kanner at acm.org > 650-326-8204 > > Question authority and the authorities will question you. > > > ______________________________**_________________ > Leica Users Group. > See > http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for > more information > > -- Tina Manley, ASMP www.tinamanley.com