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Zero Shadow Day in India: When the sun remains directly overhead and forms no shadow of any object, that day is known as Zero Shadow Day. On 18 August 2023, Bengaluru will witness Zero Shadow Day for just 3 minutes. This is a special celestial event that occurs twice a year. Earlier, 0 Shadow Day occurred in Bengaluru on April 25, 2023.
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What is Zero Shadow Day?
During the Zero Shadow Day event, the sun reaches the highest point of the sky (zenith position), which results in the size reduction of the object’s shadow to the extent that it is no longer visible. It occurs between the Tropics of Cancer and Capricorn (+23.5 and -23.5 degrees latitude). This event is also known as no shadow day in some places of the world.
Also Read: Tropic of Cancer Passes Through How Many States in India?
Quick Facts About Zero Shadow Day in India
- Zero Shadow Day is a biannual celestial event that occurs in a particular place.
- Bengaluru, Bhubaneshwar, Mumbai, and Chennai are the cities that lie between the Tropics of Cancer and Capricorn, so are likely to observe Zero Shadow Day.
- Zero Shadow Day occurs only in April, May, and August.
- The next Zero Shadow Day is expected to take place in Bengaluru on April 25, 2024
Also Read: What is the Distance Between Moon and Earth?
Science Behind No Shadow Day
On Zero Shadow Day, when the sun crosses the location of the meridian, sun rays fall directly at 90 degrees. Due to this, the length of an object’s shadow starts reducing until it is no longer visible. The Earth’s axial tilt is about 23.5 degrees, which contributes to this captivating event. In other words, during this declination of Sun becomes equal to the longitude of the location.
Must Read: What is The Distance Between Earth and Sun?
FAQs
When the Sun is directly overhead on any object and forms no shadow for a few minutes, that day is known as a no shadow day or Zero Shadow day.
Zero Shadow Day is a biannual event so it occurs two times a year.
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