Magnification is the process of enlarging an object or image to enable a closer view. It is typically used with microscopes, telescopes, and cameras to view small or distant objects. Magnification can also refer to the ratio of the size of an object on a screen to its real size. Magnification is the increase in size of an object when viewed through a spherical mirror. Magnification is most often expressed as the ratio of the size of the object when viewed through the mirror, compared to the size of the object when viewed without the mirror. It is also sometimes expressed as a percentage. Magnification can be increased by increasing the curvature of the mirror, or by increasing the distance between the object and the mirror.