Whispering-gallery wave Whispering-gallery wave Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul’s Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing, as well as in astronomy. Whispering-gallery waves were first explained for the case of St Paul's Cathedral circa 1878 by Lord Rayleigh, who revised a previous misconception that whispers could be heard across the dome but not at any intermediate position. He explained the phenomenon of travelling whispers with
Trail of the Whispering Giants Trail of the Whispering Giants The Trail of the Whispering Giants is a collection of sculptures by Hungarian-born artist Peter Wolf Toth. The sculptures range in height from , and are between in diameter. In 2009, there were 74 "Whispering Giants", with at least one in each of the 50 U.S. states, as well as in Ontario and Manitoba, Canada, and one in Hungary. One in Oregon was removed in 2017 after irreparable windstorm damage, reducing the total to 73. In 1988, Toth completed his goal of placing at least one statue in each of the 50 states, by carving