What data did Roemer use to calculate the speed of light?
| October 25, 2020 | Education
He used the minimum and maximum distance from Earth to Jupiter’s moon. These distances differed by an amount equal to the diameter of the earth’s orbit. When the Earth was at the shortest distance from Jupiter, the satellite left 22 minutes earlier than when the Earth was at its maximum distance. By dividing the diameter of the earth’s orbit by the time difference, Römber calculated the speed of light.
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