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.
How fast does venus rotate or revolve? Venus takes about 243 Earth days to complete a full rotation, which is very slow by planet standards. Venus has an equatorial circumference of 23,628 miles, which gives us â¦ a tangential rotational speed of about 4 miles per hour at the equator.