Questões de Física · UFSCar

FísicaAstronomiaUFSCar 2016

UFSCar – Edital nº 001/ – Técnico-Administrativo em Educação

Questão de Física

At Syene (now Aswan), located 800 km southeast of Alexandria in Egypt, the Sun's rays fall vertically at noon at the summer solstice. Eratosthenes, who was a Greek mathematician, geographer and astronomer (born in 276 BC) noted that at Alexandria, at the same date and time, sunlight fell at an angle of about 7° from the vertical. He assumed the Sun's distance to be very great. Given the distance between the two cities, he was able to calculate:

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