4D X HAPPY POWER

power 4dA convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective power of combination will be . View Solution; The power of a concave lens is 10 D and that of aDownload the following free and ready-to-use 4d powerpoint templates and Google slides themes for the upcoming presentation. You only need to change text, logo or colors on