Optical Cavity

An optical cavity is a space between two or more mirrors that traps light by reflecting it back and forth. This setup allows the light waves to interfere constructively, strengthening certain wavelengths or frequencies. Optical cavities are vital in lasers, where they help amplify light to produce a coherent and intense beam. By controlling the length of the cavity and mirror properties, scientists can precisely manipulate the characteristics of the light, such as its wavelength and intensity. Essentially, an optical cavity acts like a controlled environment that encourages specific light behaviors for various scientific and technological applications.