A Profile of Greek Mathematician Eratosthenes

A Profile of Greek Mathematician Eratosthenes Eratosthenes (c.276-194 B.C.), a mathematician, is known for his scientific computations and geometry. Eratosthenes was called Beta (the second letter of the Greek letters in order) since he was rarely first, yet he is more well known than his Alpha instructors since his revelations are as yet utilized today. Boss among these are the count of the outline of the earth (note: the Greeks knew the earth was round) and the improvement of a scientific strainer named after him. He made a schedule with jump years, a 675-star index, and maps. He perceived the Niles source was a lake, and that downpours in the lake district made the Nile flood. Eratosthenes - Life and Career Facts Eratosthenes was the third custodian at the acclaimed Library of Alexandria. He concentrated under the Stoic savant Zeno, Ariston, Lysanias, and the writer thinker Callimachus. Eratosthenes composed a Geographica dependent on his computations of the circuit of the earth. Eratosthenes is accounted for to have starved himself to death at Alexandria in 194 B.C. Composing of Eratosthenes A lot of what Eratosthenes composed is presently lost, including a geometrical treatise, On Means, and one on the science behind Platos reasoning, Platonicus. He likewise composed the essentials of space science in a sonnet called Hermes. His most renowned estimation, in the now lost treatise On the Measurement of the Earth, clarifies how he thought about the shadow of the sun at Summer Solstice early afternoon in two spots, Alexandria and Syene. Eratosthenes Calculates the Circumference of the Earth By looking at the shadow of the sun at Summer Solstice early afternoon at Alexandria and Syene, and knowing the separation between the two, Eratosthenes determined the boundary of the earth.The sun shone straightforwardly into a well at Syene around early afternoon. At Alexandria, the edge of tendency of the sun was around 7 degrees. With this data, and realizing that Syene was 787 km due south of Alexandrian Eratosthenes determined the boundary of the earth to be 250,000 stadia (around 24,662 miles).