0-9 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
A region bounded by two or more mirrors that are aligned to provide multiple reflections of lightwaves. Note: The resonator in a laser is an optical cavity. In this sense, synonym resonant cavity.