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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

phenomenon go
any state or process known through the senses rather than by intuition or reasoning

natural phenomenon go
all phenomena that are not artificial

physical phenomenon go
a natural phenomenon involving the physical properties of matter and energy

optical phenomenon
a physical phenomenon related to or involving light

noun.phenomenon

10 Subcategories

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