A report on Light, Sun and Optical phenomena

A triangular prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (blue) are separated.
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A 22° halo around the Moon in Atherton, California
The electromagnetic spectrum, with the visible portion highlighted
Illustration of the Sun's structure, in false color for contrast
A solar halo as seen from 41° south latitude
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Illustration of a proton-proton reaction chain, from hydrogen forming deuterium, helium-3, and regular helium-4.
A circumzenithal arc over Grand Forks, North Dakota
Beam of sun light inside the cavity of Rocca ill'Abissu at Fondachelli-Fantina, Sicily
Illustration of different stars's internal structure, the Sun in the middle has an inner radiating zone and an outer convective zone.
The Belt of Venus over Paranal Observatory atop Cerro Paranal in the Atacama Desert, northern Chile
Due to refraction, the straw dipped in water appears bent and the ruler scale compressed when viewed from a shallow angle.
High-resolution image of the Sun's surface taken by the Daniel K. Inouye Solar Telescope (DKIST)
Green flash appears above the solar disc for a second or so. One such occurrence was taken from Cerro Paranal.
Hong Kong illuminated by colourful artificial lighting.
During a total solar eclipse, the solar corona can be seen with the naked eye, during the brief period of totality.
Pierre Gassendi.
The Sun's transition region taken by Hinode's Solar Optical Telescope
Christiaan Huygens.
Sunlight and glare seen overlooking from the International Space Station
Thomas Young's sketch of a double-slit experiment showing diffraction. Young's experiments supported the theory that light consists of waves.
Once outside the Sun's surface, neutrinos and photons travel at the speed of light
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Visible light photograph of sunspot
Measurements from 2005 of solar cycle variation during the previous 30 years
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The size of the current Sun (now in the main sequence) compared to its estimated size during its red-giant phase in the future
The Solar System, with sizes of the Sun and planets to scale. The terrestrial planets are on the right, the gas and ice giants are on the left.
The Trundholm sun chariot pulled by a horse is a sculpture believed to be illustrating an important part of Nordic Bronze Age mythology.
Sol, the Sun, from a 1550 edition of Guido Bonatti's Liber astronomiae.
False-color image taken in 2010 as seen in 30.4-nanometer ultraviolet light wavelength
A false-color of a coronal hole on the Sun forming a question mark (22 December 2017)
A false-color solar prominence erupts in August 2012, as captured by the Solar Dynamics Observatory
The Sun seen from Earth, with glare from the lenses. The eye also see glare when looked towards the Sun directly.
Sun and Immortal Birds Gold Ornament by ancient Shu people. The center is a sun pattern with twelve points around which four birds fly in the same counterclockwise direction, Shang dynasty

Optical phenomena are any observable events that result from the interaction of light and matter.

- Optical phenomena

It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as light, ultraviolet, and infrared radiation.

- Sun

The main source of natural light on Earth is the Sun.

- Light

One famous observation is of the bending of light from a star by the Sun observed during a solar eclipse.

- Optical phenomena

The observation and study of optical phenomena such as rainbows and the aurora borealis offer many clues as to the nature of light.

- Light

An optical phenomenon, known as a green flash, can sometimes be seen shortly after sunset or before sunrise.

- Sun
A triangular prism dispersing a beam of white light. The longer wavelengths (red) and the shorter wavelengths (blue) are separated.

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