Examples of convex lens in the following topics:

 A magnifying glass is a convex lens that lets the observer see a larger image of the object being observed.
 A magnifying glass is a convex lens that lets the observer see a larger image of the object under observation.
 The lens is usually mounted in a frame with a handle, as shown below .
 The highest magnifying power is obtained by putting the lens very close to the eye and moving both the eye and the lens together to obtain the best focus.
 A magnifying glass is a convex lens that lets the observer see a larger image of the object under observation.






 A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
 If the lens is biconcave, a beam of light passing through the lens is diverged (spread); the lens is thus called a negative or diverging lens.
 The signs of the lens' radii of curvature indicate whether the corresponding surfaces are convex or concave.
 The sign convention used to represent this varies, but for our treatment if R1 is positive the first surface is convex, and if R1 is negative the surface is concave.
 The signs are reversed for the back surface of the lens: if R2 is positive the surface is concave, and if R2 is negative the surface is convex.



 The outer rings are spaced more closely than the inner ones because the slope of the curved lens surface increases outwards.
 where N is the brightring number, R is the radius of curvature of the lens the light is passing through, and λ is the wavelength of the light passing through the glass.
 A spherical lens is placed on top of a flat glass surface.
 As one gets farther from the point at which the two surfaces touch, the distance d increases because the lens is curving away from the flat surface .
 Newton's rings seen in two planoconvex lenses with their flat surfaces in contact.