Observable events that result from the interaction of light and matter
A 22° halo around the Moon in Atherton, California
Optical phenomena are any observable events that result from the interaction of light and matter.
All optical phenomena coincide with quantum phenomena.[1] Common optical phenomena are often due to the interaction of light from the Sun or Moon with the atmosphere, clouds, water, dust, and other particulates. One common example is the rainbow, when light from the Sun is reflected and refracted by water droplets. Some phenomena, such as the green ray, are so rare they are sometimes thought to be mythical.[2] Others, such as Fata Morganas, are commonplace in favored locations.
Other phenomena are simply interesting aspects of optics, or optical effects. For instance, the colors generated by a prism are often shown in classrooms.
A solar halo as seen from 41° south latitude
^Lahiri, Avijit (2016). "Electromagnetic Theory and Optics". Basic Optics: Principles and Concepts. Elsevier. pp. 1–140. doi:10.1016/B978-0-12-805357-7.00001-0. ISBN 978-0-12-805357-7.
^"Green Rays". mintaka.sdsu.edu.
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