Iridescence, or sheen that shifts color depending on your viewing angle, is pretty in peacock feathers. But it's been a nuisance for engineers trying to mimic the birds' unique color mechanism to make high-resolution, reflective, ...
Feb 05, 2013 in Optics & Photonics
(PhysOrg.com) -- A scholar from Oxford's English Faculty has discovered that a painting lauded as the only known portrait of William Shakespeare painted from life is almost certainly of somebody else.
Mar 23, 2009 in Other