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The Green Flash is a captivating atmospheric phenomenon that occurs during sunrise or sunset. For a fleeting moment, as the sun dips just below or rises above the horizon, a vivid green light may appear at the upper edge of the solar disk. This dazzling display, lasting only a few seconds, is due to the refraction and dispersion of light in the atmosphere.

The phenomenon happens because our atmosphere acts as a prism, bending and splitting sunlight into various colors. Since blue and violet light scatter and are often absorbed by the atmosphere, it's usually the green light that becomes visible as a flash. For this reason, the Green Flash can often be seen best in locations with clear skies and a flat horizon, such as over an ocean.

There are different types of green flashes, with the most common being the inferior mirage flash, which occurs over a warm sea horizon. In contrast, the mock mirage flash happens when the temperature of the atmosphere decreases with height, leading to a shimmering mirage effect. Rarer variations include the green ray, which is a vertical shaft of green light extending upward, and the Novaya Zemlya effect, where the sun appears above the horizon longer than expected due to atmospheric refraction.

While often shrouded in legend and considered elusive, the Green Flash is a scientifically understood marvel, a beautiful interplay of light and the atmosphere. Observers cherish catching a glimpse, believing it to bring good luck, and it remains one of nature's most fascinating spectacles.