Inhoudsopgave
Wat deed Eratosthenes?
Achtergrond. Hij werkte als wiskundige, geograaf, astronoom, historicus, geleerde, filosoof en dichter. In opdracht van de Egyptische koningen uit de dynastie der Ptolemaeën leidde hij de bibliotheek van Alexandrië, de belangrijkste bibliotheek uit de oudheid, ongeveer veertig jaar als hoofdbibliothecaris.
When did Eratosthenes live?
Lived c. 276 BC – c. 194 BC. Eratosthenes was an Ancient Greek scientist born in the town of Cyrene in about 276 BC. Cyrene, then a Greek city, is now the town of Shahhat in Libya.
What was Eratosthenes’experiment?
Repeat Eratosthenes’ Experiment A simplified explanation of Eratosthenes’ Experiment Eratosthenes and the Circumference of the Earthfrom Rogue Roboton Vimeo. Eratosthenes measured, at his local noon in Alexandria, the angle of elevation of the sun on the summer solstice (21 June).
What are the contributions of Eratosthenes in the field of math?
• Eratosthenes produced a reliable, logical method to discover prime numbers: The Sieve of Eratosthenes. In an updated form, this is still important in modern number theory. • In about 240 BC Eratosthenes calculated Earth’s size with good accuracy.
What is the sieve of Eratosthenes?
He is credited with devising an algorithm for finding prime numbers called the sieve of Eratosthenes, in which one arranges the natural numbers in numerical order and strikes out one, every second number following two, every third number following three, and so on, which just leaves the prime numbers.
Hoeveel dagen de wereld rond?
Je kan niet precies op de evenaar wandelen want daar vind je grotendeels water. Maar stel dat je dat zou kunnen, dan moet je 40 000 kilometer afleggen, aan 25 kilometer per dag. Dus : het aantal dagen is dan 40 000 / 25 = 1600 dagen, dat is ongeveer 4 jaar en vier maand, en nog een paar dagen.
What obstacles did Eratosthenes have to overcome?
Sometime in the middle of his life Eratosthenes became a mathematician, geographer, and scientist and made the discoveries he is most well known for. Around 194 B.C.E. Eratosthenes died from starving himself to death, after he became blind and could no longer do his work. One major obstacle needed to be overcome in Eratosthenes work.
This method became known as the sieve of Eratosthenes, as it works by filtering out the non-prime numbers in the same way that a sieve filters solids out of liquids. In his old age, Eratosthenes became blind and he died of self-induced starvation in either 192 or 196 BCE in Alexandria, Egypt. He lived to be about 80 to 84 years old.
How old was Eratosthenes when he died?
He lived to be about 80 to 84 years old. Eratosthenes was one of the greatest Greek polymaths, and his work influenced later innovators in fields ranging from mathematics to geography. Admirers of the Greek thinker called him Pentathlos, after the Greek athletes known for their prowess in a number of different events.
What did Eratosthenes look like?
Eratosthenes was educated in philosophy and mathematics in Athens. We do not know what he looked like. The image above is from a painting by Bernardo Strozzi in the year 1635, nineteen centuries after the era of Eratosthenes. It shows Eratosthenes teaching geography, the academic discipline he founded.