Scientists Replicate Color-Changing Effect of 1,600-Year-Old Roman Cup
Scientists have rediscovered how to replicate the color-changing effect of a 1,600-year-old Roman cup, known as the Lycurgus Cup. The cup changes color from green to ruby red depending on how light hits it. After years of experimentation, technicians have cracked the mystery behind this ancient glass masterpiece's unique optical properties.
The Times of India·

