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.
When Venus was first formed it may have had a different obliquity and rotation period. It changed to the current rotation period because of tidal effects and planetary perturbations on its atmosphere. Venus takes 242 earth days to rotate on its axis, so a day on Venus is about 242 Earth days.This is the slowest rate of a planet in our Solar System. 243 earth days in Venus takes longer than a Venusian year which is 224.7 earth days. The sun also rises in the west and sets on the east in Venus.he distance of Venus from the sun as it orbits around is 108,000,000 kilometers (0.7 AU). It takes Venus 224.65 days to complete its orbit, which means a year on Venus is approximately 224.65 Earth days. While all planetsâ orbits are elliptical, Venusâ orbit is the only one which is closest to circular.