On tuesday, Bengaluru residents will witness a rare celestial phenomenon when their shadows vanish. The day with no shadows will start at noon because there won't be any perpendicular shadows preserved on the surface. In various regions of the world, the unusual event happens twice a year when the sun reaches a specific point in the sky, usually during the spring and autumn equinoxes. The sun is precisely above the equator at this hour, causing the sun's rays to fall perpendicular to the surface of the planet.

For a brief amount of time throughout the day, this uncommon alignment prevents the casting of shadows. In some regions of the world, including the tropics, it is a fascinating occurrence that can be seen. A ceremony will be held at the indian Institute of Astrophysics' koramangala campus on tuesday to commemorate the occasion.

"If we have a vertical reference, such as a pole, at 12:17 pm the sun will be overhead and as a result, there will be no shadow of the reference pole," The Association of Bangalore Amateur Astronomers wrote in a post. The Earth's axial tilt, which causes the sun's location in the sky to change throughout the year, is what creates the zero-shadow day. This causes the angle at which the sun's rays strike the earth's surface to fluctuate throughout the year because the earth is tilted at an angle of 23.5 degrees with respect to the plane of its orbit around the sun.

During the spring and autumn equinoxes, the sun's rays strike Earth at a 90-degree angle, casting no shadows; however, as the Earth's axial tilt changes throughout the year, the sun's position in the sky shifts, casting varying shadow lengths.

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zero shadow day

SIBY JEYYA

25/04/2023 12:34 PM