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
Faras Gallery at the National Museum in Warsaw Faras Gallery at the National Museum in Warsaw The Professor Kazimierz Michałowski Faras Gallery at the National Museum in Warsaw is a permanent gallery at the National Museum in Warsaw, presenting Nubian early Christian art. The Gallery features a unique collection of wall paintings and architectural elements from the Faras Cathedral, discovered by an archeological mission led by Professor Kazimierz Michałowski. Most of the artworks shown in the Faras Gallery found their way there thanks to the archaeologists participating in the international effort to save the remains of old Nile basin cultures, known as the Nubian Campaign. The Nubian Campaign