Whispering-gallery wave
WAVE THAT CAN TRAVEL AROUND A CONCAVE SURFACE
Whispering Gallery Wave; Whispering gallery wave; Whispering gallery mode; Whispering-gallery modes; Whispering-gallery waves; Whispering gallery modes; Whispering-gallery mode; Whispering gallery waves
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.