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,
Guildhall Art Gallery lay derelict for hundreds of years. In the 11th century the area was reoccupied and by the 12th century the first Guildhall was built next to it. Guildhall Art Gallery The Guildhall Art Gallery houses the art collection of the City of London, England. It occupies a building that was completed in 1999 to replace an earlier building destroyed in The Blitz in 1941. It is a stone building in a semi-gothic style intended to be sympathetic to the historic Guildhall, which is adjacent and to which it is connected internally. The gallery was originally built in 1885 to house