Color-changing Roman Glass
Posted: Sun Sep 01, 2013 6:10 pm
by jfrancis
The British Museum has a a 1,600-year-old Roman chalice that becomes a different color depending on which direction the light comes from. No one knew why until scientists got a good look at the way the glass was made.
http://www.neatorama.com/2013/09/01/The ... -Pioneers/
Re: Color-changing Roman Glass
Posted: Sun Sep 01, 2013 7:41 pm
by bograt
Cool! thanks
Re: Color-changing Roman Glass
Posted: Tue Sep 03, 2013 2:16 pm
by sandykoufax
no video?
Re: Color-changing Roman Glass
Posted: Tue Sep 03, 2013 4:59 pm
by bograt
Judging from the color of the metal this effect is less extreme in real life.
Presumably this effect is caused by Tyndall scattering like the material mentioned here:
http://www.maxwellrender.com/forum/view ... ss#p367392