It is desired to project onto a screen an image that is four times the size of a brightly illuminated object . A plano-convex lens with n=1.50 and R=60 cm is to be used . Employing the Newtonian from of the lens equations , determine the appropriate distance of the object and screen from the lens . Is the image erect or inverted ? Check your results using the ordinary lens equations .

It is desired to project onto a screen an image that is four times the size of a brightly illuminated object . A plano-convex lens with n=1.50 and R=60 cm is to be used . Employing the Newtonian from of the lens equations , determine the appropriate distance of the object and screen from the lens . Is the image erect or inverted ? Check your results using the ordinary lens equations .