1.A biconvex lens has radii of curvature 20 cm20\;\text{cm}20cm each. If the refractive index of the material of the lens is 1.51.51.5, the power of the lens isa.+20 D+20\;\text{D}+20Db.+5 D+5\;\text{D}+5Dc.infinityd.+2 D+2\;\text{D}+2DLogin to continueOnly logged in users canattempt or see the solution.
