Halos, a plural noun, refers to a bright circle or ring of light that appears to surround a source of light, such as the sun, moon, or artificial light. This optical phenomenon occurs due to the diffraction, scattering, or bending of light by water droplets or ice crystals present in the atmosphere. The circular shape of a halo can be observed when the light is refracted at an angle of approximately 22 degrees, resulting in a ring that encompasses the luminous object.
Halos are commonly observed in conjunction with clouds, fog, or mist. They manifest in a variety of colors, including red, orange, yellow, green, blue, and violet, with red hues appearing on the inner side of the ring and blue appearing on the outer side. The coloration arises due to the dispersion of light as it undergoes different degrees of refraction at specific wavelengths.
Though often associated with celestial bodies, halos can also be perceived around artificial lights, such as street lamps or headlights. Additionally, halos can occur around objects in photography if there is a pronounced backlight or lens flare.
Halos have long been regarded with curiosity and attributed with symbolism in various cultures throughout history, representing purity, divinity, or supernatural realms. Additionally, they hold significance in religious art, often depicted surrounding the heads of saints or deities as an indicator of their spiritual aura.
