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
Art Gallery Building Art Gallery Building The Art Gallery Building is a commercial building located at 156 South Washington Street in Constantine, Michigan. It was listed on the National Register of Historic Places in 1980. The building is particularly notable for its cast iron Italianate upper facade - the only such building in Constantine and perhaps the only one in the entire region. The Art Gallery Building was constructed in 1877 for George I. Crossett to house his Crossett Drug Store on the first floor, along with a photographic studio on the second floor. The studios on the second floor led to the