Solar halo
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A solar halo is an optical spectacle that occurs when sunlight refracts off ice crystals in high clouds.
When this happens, a circle of light forms around the sun, creating a beautiful ring of colours.
It is as if the sun is surrounded by a shimmering, magical halo. The most common colours that can be seen in a solar halo are red, orange, yellow, green, blue and violet.
The frequency of each colour in the visible spectrum is measured in terahertz (THz) or hertz (Hz).
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For example, red light has a frequency of about 430 THz, while violet light has a frequency of about 750 THz.
It is important to note that looking directly at the sun can be harmful to the eyes, even during a solar halo, so it is recommended to use appropriate solar filters or view the phenomenon through safe methods, such as projecting the image onto a clear surface.
The solar halo is a reminder of the beauty and wonder that surrounds us in the sky. If you are lucky enough to witness this phenomenon, take a moment to enjoy it and marvel at the magic of the universe.
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