WebEratosthenes' model depends on the assumption that the earth is a globe and that the sun is far away and therefore produces parallel rays of light all over the earth. If the sun is nearby, then shadows will change length even for a flat earth. A flat earth model is sketched below. The vertical stick casts shadows that grow longer as the stick ... WebEratosthenes' experiment (205 BC) gave the first estimation of the Earth’s radius simply by observing the shadow of a vertical stick at noon local solar time. To estimate the Earth’s …
How Eratosthenes Calculated the Earth
Eratosthenes of Cyrene was a Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist. He was a man of learning, becoming the chief librarian at the Library of Alexandria. His work is comparable to what is now known as the study of geography, and he introduced some of the terminology still used today. WebDec 27, 2024 · Eratosthenes had heard that in Syene, a city south of Alexandria, no vertical shadows were cast at noon on the summer solstice. The sun was directly overhead. He wondered if this were also true... great stuff expanding floral foam filler
READ: Eratosthenes of Cyrene (article) Khan Academy
WebEratosthenes' stick experiment can not only tell us about the size of the earth, but can also be used to compute the distance to the sun as well. In his experiment Eratosthenes … WebJan 11, 2024 · Back in 240 B.C.E., a Greek named Eratosthenes calculated the circumference of the earth. Today we know how to measure circumference of many things, including earth, using many modern tools, but Eratosthenes did it with a well, the sun, and a stick. Setting the cosmological stage Our sun is very far away from earth, … WebJul 13, 2012 · The experiment ready to use on the ground. Second challenge: Measuring the circunference of the Earth Thanks to the shade of a stick, Eratosthenes was able to measure the circumference of the … great stuff expanding foam uk