Aconvex mirror has a radius of 20 cm. an object is placed 50 cm from the mirror. find the location of the image, the magnification, and the type of image formed. 2. for the previous mirror system, draw the three principle rays and compare your results to that obtained for the previous problem. 3. a convex mirror has a radius of 60 cm. an object is placed 200 cm from the mirror. find the location of the image, the magnification, and the type of image formed. for the previous mirror system, draw the three principle rays and compare your results to that obtained for the previous problem.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.