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.
Another thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.Our planet takes only 24 hours, or one full Earth day, to rotate on its axis and a year to revolve around the Sun. Venus, however, takes 243 days to turn one time on its axis and almost 225 days to revolve around the Sun in orbit.nother thing that differs between the two planets is the direction of their rotation. Venus s rotation takes longer than a year and it rotates backwards. Note that a rotation is when an object spins once on its own axis.