High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Optical feedback is the optical equivalent of acoustic feedback. The feedback occurs when a loop exists between an optical input, for example, a videocamera, and an optical output, for example, a television screen or monitor. (A simple example of optical feedback is an image cast between mirrors.) In this GIF movie, and the JPG still image examples (right), light from a candle is received by a videocamera, amplified and then sent by cable to a monitor projecting electron beams on the inside of the monitor screen. The image on the monitor is then captured by the videocamera again, and fed back to the monitor in a continuous loop.

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