History of Eyeglasses and Sunglasses. The inventor of the first spectacle lenses is unknown. Roman tragedian Seneca (4 BC -65AD) is said to have used a glass globe of water as a magnifier to read ''all the books of Rome''. It's been reported that monks in the middle ages used glass spheres as magnifying glasses to read.
exists and is an alternate of . The Planet Venus has the slowest rotation rate because one day there is longer than the year on Venus or longer than its revolution around the sun. The Planet Venus has the slowest rotation rate because one day there is longer than the year on Venus or longer than its revolution around the sun.
Answers. Best Answer: Orbital period (Time for 1 orbit around Sun): 225 Days Rotational Period: 243 Days Venus spins backward on its axis as compared to the other planets and its day is longer than its year. Thinking is that its rotation was affected/disturbed by an impact sometime in the past. Source(s):