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|Noun||1.||optical phenomenon - a physical phenomenon related to or involving light|
physical phenomenon - a natural phenomenon involving the physical properties of matter and energy
optical aberration, aberration, distortion - an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
absorption band - a dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengths
diffraction - when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
interference fringe, fringe - one of the light or dark bands produced by the interference and diffraction of light
incidence - the striking of a light beam on a surface; "he measured the angle of incidence of the reflected light"
optical illusion - an optical phenomenon that results in a false or deceptive visual impression
pleochroism - the phenomenon of different colors appearing when certain crystals are viewed from different directions
polarization, polarisation - the phenomenon in which waves of light or other radiation are restricted in direction of vibration
parallax - the apparent displacement of an object as seen from two different points that are not on a line with the object
Tyndall effect - the phenomenon in which light is scattered by very small particles in its path; it makes a beam of light visible; the scattered light is mainly blue