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How did eratosthenes determine the size of the earth?
Eratosthenes determined the size of the Earth by measuring the angle of the shadow cast by a vertical stick in two different locations on the same day. By comparing the angles at the two locations and knowing the distance between them, he was able to calculate the Earth's circumference.
How did Eratosthenes estimate the size of Earth in 240 BC?
Eratosthenes estimated the size of Earth in 240 BC by comparing the angles of the shadows cast by sticks in two different cities on the same day. By calculating the difference in the angles, he was able to determine the circumference of the Earth with impressive accuracy for the time period.
Who measured the size of the earth using a shadow stick and knowing the distance between two cities?
Eratosthenes, a Greek mathematician and astronomer, measured the size of the Earth using a shadow stick in the city of Alexandria and knowing the distance to the city of Syene. By observing the angle of the shadow at each location and using basic geometry, he was able to calculate the Earth's circumference.
Ertaosthenes determined the circumference of earth by conducting an experiment what are the steps?
Eratosthenes calculated the Earth's circumference by measuring shadows at two different locations at the same time. He then used the angles of the shadows cast by a vertical stick to calculate the Earth's circumference using geometry and trigonometry. By comparing the shadow angles at two different locations, Eratosthenes was able to estimate the Earth's size accurately.
Why eratosthenes selected June 21 at the date for his observations?
Eratosthenes selected June 21, the summer solstice, for his observations because it is the date when the sun is at its highest point in the sky, resulting in the longest day of the year. On this day, he aimed to measure the angle of the sun's rays at noon in different locations to calculate the Earth's circumference. This was possible because, at noon in the city of Syene (now Aswan, Egypt), the sun was directly overhead, while in Alexandria, it cast a measurable shadow. This method allowed him to utilize the geometry of the situation to derive an accurate estimate of the Earth's size.
In 250 BC who determined the size of the earth?
Eratosthenes
How did Eratosthenes determined the size of the Earth?
The used an orange
Who made the first attempt to determine the size of the earth?
Eratosthenes
The first accurate measurement of the size of Earth was made by .?
Eratosthenes
Who discovered the earths curcumference?
The Greek mathematician and astronomer Eratosthenes is credited with calculating the Earth's circumference around 240 B.C. using the angle of the sun's rays at two different locations and the distance between those locations. This method provided a reasonably accurate estimate of the Earth's size.
How did eratosthenes determine the size of the earth?
Eratosthenes determined the size of the Earth by measuring the angle of the shadow cast by a vertical stick in two different locations on the same day. By comparing the angles at the two locations and knowing the distance between them, he was able to calculate the Earth's circumference.
Who were the first people to calculate the size of the Earth and the Earth-Moon distance?
The first people to calculate the size of the Earth and the Earth-Moon distance were the ancient Greek mathematician and astronomer, Eratosthenes, and the ancient Greek astronomer and mathematician, Hipparchus.
What year did Eratosthenes die?
Eratosthenes is famous for making the first good measurement of the size of the Earth. He lived from 276 to 194 B.C. and died in Alexandria at age 82. He was rumored to have starved himself to death after going blind.
Who measured the size of the earth using a shadow stick and knowing the distance between two cities?
Eratosthenes, a Greek mathematician and astronomer, measured the size of the Earth using a shadow stick in the city of Alexandria and knowing the distance to the city of Syene. By observing the angle of the shadow at each location and using basic geometry, he was able to calculate the Earth's circumference.
How did Eratosthenes estimate the size of Earth in 240 BC?
Eratosthenes estimated the size of Earth in 240 BC by comparing the angles of the shadows cast by sticks in two different cities on the same day. By calculating the difference in the angles, he was able to determine the circumference of the Earth with impressive accuracy for the time period.
Who was the first person to calculate the earth circumference?
The first person credited with accurately calculating the Earth's circumference was the ancient Greek mathematician and astronomer Eratosthenes in the 3rd century BC. He did so by measuring the angle of the sun's rays at two different locations and using simple geometry to estimate the Earth's size.
Who said that the earth is a sphere?
Columbus said the earth was sphere when he traveled to America
