In meteorology, a corona (plural coronae) is an optical phenomenon produced by the diffraction of sunlight or moonlight (or, occasionally, bright starlight...

halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with...

constellation Corona (optical phenomenon), coloured rings around Sun or Moon Corona (planetary geology) CORONA (rocket), a Russian prototype CORONA (satellite)...

surrounds a person in religious art Halo (optical phenomenon), glory (optical phenomenon) or corona (optical phenomenon), phenomena where a ring of light surrounds...

called a parhelion (plural parhelia) in meteorology, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun. Two...

Cloud iridescence or irisation is a colorful optical phenomenon that occurs in a cloud and appears in the general proximity of the Sun or Moon. The colors...

called witchfire or witch's fire) is a weather phenomenon in which luminous plasma is created by a corona discharge from a rod-like object such as a mast...

of the (hot and therefore fast-moving) electrons. Although the K-corona is a phenomenon of the electrons in the plasma, the term is frequently used to describe...

Coronal rain is a phenomenon that occurs in the Sun's corona when hot plasma cools and condenses in strong magnetic fields and falls to the photosphere...

as the magneto-optic Faraday effect (MOFE), is a physical magneto-optical phenomenon. The Faraday effect causes a polarization rotation which is proportional...

A 22° halo is an atmospheric optical phenomenon that consists of a halo with an apparent radius of approximately 22° around the Sun or Moon. Around the...

names that have been used to describe this phenomenon include scintillation, halo effect, pixie dust, and corona effect. Helicopter rotors are fitted with...

technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications...

In atmospheric optics, a photometeor is a bright object or other optical phenomenon appearing in the Earth's atmosphere when sunlight or moonlight creates...

the Cosmos. In meteorology, an aureole is the inner disk of a corona, an optical phenomenon produced by the diffraction of light from the Sun or the Moon...

affect all layers of the solar atmosphere (photosphere, chromosphere, and corona). The plasma medium is heated to >107 kelvin, while electrons, protons,...

four or more sundogs. A common optical phenomenon involving water droplets is the glory. A glory is an optical phenomenon, appearing much like an iconic...

reflected. This phenomenon is called total internal reflection and allows for fibre optics technology. As light travels down an optical fibre, it undergoes...

and Education Corner reflector Cornering force Corona Corona (optical phenomenon) Corona discharge Corona poling Coronal mass ejection Coronal radiative...

completely obscures the bright light of the Sun, allowing the much fainter solar corona to be visible. During an eclipse, totality occurs only along a narrow track...

surrounded by the million-kelvin solar corona. For most wavelengths this region is optically thin, i.e. has small optical depth, and must, therefore, be limb-brightened...

on the Earth's surface. This phenomenon is sometimes called the corona effect, not to be confused with the solar corona. On the right is a 1/10-second...

Cathodoluminescence is an optical and electromagnetic phenomenon in which electrons impacting on a luminescent material such as a phosphor, cause the emission...

a “faint halo” around the sun. Bishop observed the phenomenon on September 5, 1883; the phenomenon was subsequently named after him, and was the subject...

which is observed when laser light falls on an optically rough surface is also a diffraction phenomenon. When deli meat appears to be iridescent, that...

of the two-million-degree temperature of the Sun's outermost layer, the corona. The solar wind reaches Earth with a velocity typically around 400 km/s...

and high humidity contribute to this atmospheric attenuation. An optical phenomenon, known as a green flash, can sometimes be seen shortly after sunset...

A Lowitz arc is an optical phenomenon that occurs in the atmosphere; specifically, it is a rare type of ice crystal halo that forms a luminous arc which...

downward, with divergence near the surface. convergence zone corona An optical phenomenon consisting of apparent concentric, pastel-colored rings around...

air is the cause of blue light emitted by electric sparks, lightning, and corona discharges (e.g. St. Elmo's fire). Auroras, the sometimes observable blue-violet...