Whispering-gallery wave known as surface plasmons has been demonstrated in the form of whispering-gallery waves, and likewise for exciton-polaritons in semiconductors. Galleries simultaneously containing both acoustic and optical whispering-gallery waves have also been made, exhibiting very strong mode coupling and coherent effects. Hybrid solid-fluid-optical whispering-gallery structures have been observed as well. 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,
Ferens Art Gallery Ferens Art Gallery The Ferens Art Gallery is an art gallery in the English city of Kingston upon Hull. The site and money for the gallery were donated to the city by Thomas Ferens, after whom it is named. The architects were S. N. Cooke and E. C. Davies. Opened in 1927, it was restored and extended in 1991. The gallery features an extensive array of both permanent collections and roving exhibitions. Among the exhibits is a portrait of an unknown woman by Frans Hals. The building also houses a children's gallery and a popular cafe. The building is now