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Green flash occurs because the atmosphere causes the light from the Sun to separate, or refract, into different frequencies. Green flashes are enhanced by mirages, which increase refraction. A green flash is more likely to be seen in stable, clear air, when more of the light from the setting sun reaches the observer without being scattered.
Green flashes are actually a group of phenomena stemming from different causes, and some are more common than others. [36] Green flashes can be observed from any altitude (even from an aircraft). They are usually seen at an unobstructed horizon, such as over the ocean, but are possible over cloud tops and mountain tops as well.
'Pon the Mystical Green Flash. Sunset sequence with two green flashes in the second and fourth frames. Green flashes might be observed from any place with a low horizon. Deserts, oceans and ice shelves are probably the best places to observe mirages and therefore green flashes. It is easier not to miss a green flash during sunset than during ...
Bioluminescence. Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies.
Illustration of St. Elmo's fire on a ship at sea Electrostatic discharge flashes across the windscreen of a KC-10 cockpit.. St. Elmo's fire (also called witchfire or witch's fire [1]) is a weather phenomenon in which luminous plasma is created by a corona discharge from a rod-like object such as a mast, spire, chimney, or animal horn [2] in an atmospheric electric field.
Dinoflagellate bioluminescence is controlled by a circadian clock and only occurs at night. [85] Luminescent and nonluminescent strains can occur in the same species. The number of scintillons is higher during night than during day, and breaks down during the end of the night, at the time of maximal bioluminescence. [86]
Light pillars in London, Ontario, Canada. A light pillar or ice pillar is an atmospheric optical phenomenon in which a vertical beam of light appears to extend above and/or below a light source. The effect is created by the reflection of light from tiny ice crystals that are suspended in the atmosphere or that comprise high-altitude clouds (e.g ...
Bioluminescence occurs when an organism emits light through a chemical reaction [8] with the majority of the world's bioluminescent organisms living in the ocean. [9] The production of bioluminescence by P. fusiformis is thought to be a defense mechanism that startles grazers which would otherwise eat them [5] or to illuminate grazers so that they, in turn may be more visible to their own ...