Some 30 years after the death of Galileo, a Danish astronomer named Ole Romer made a systematic study of the moon, Io, of Jupiter at the Paris Observatory. As Io goes around Jupiter it periodically disappears as it goes behind Jupiter. For several months, Romer found that the expected eclipses lagged farther and farther behind the expected time, but then began to gain time again. What was clearly happening was that as Jupiter got farther away from the earth the time lagged, and when it got closer, the time gained. The observed time delay was the greatest when Jupiter was the farthest from the earth. Romer concluded that the reflected light from Io must take 22 minutes to cross the diameter (twice the radius) of earth s orbit. This was an overestimate, but by the time Newton wrote Principia, a number of astronomers had reproduced the result, and narrowed the transit time to 16 minutes. Considering that the distance from the Sun to the earth is 93 Million Miles, what do you calculate for the speed of light in miles per second?

A. 96,875 miles/second

B. 193,750 miles/sec

C. 48,438 miles/sec

D. 100 miles/hour