MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY
Laser light. Close-up of light from a laser produced by an optical resonator. An optical resonator, also known as an optical cavity, is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. A cavity resonator has interior surfaces which reflect a wave of a specific frequency, increasing its intensity. Optical resonators are a major component of lasers.
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