Magnifier, Reading Glass
Category : physics
Product Detail
A Reading Glass (or handheld magnifying glass) is the most recognizable optical instrument, consisting of a single large-diameter convex lens mounted in a frame with a handle. While simple in design, it is a versatile tool used across biology, physics, and general laboratory work to enlarge small details.
Primary Function: To produce an upright, magnified virtual image of an object when held between the object and the eye. It is primarily used for reading fine print, inspecting specimens, or observing small-scale phenomena.
Optical Principles:
Converging Lens: It uses a biconvex lens that causes light rays to converge.
Image Formation: When an object is placed within the focal length ($f$) of the lens, the eye perceives a virtual image that is larger and further away than the actual object.
Magnification ($M$): Standard reading glasses offer low to moderate magnification, typically 2x to 6x. Higher magnification is technically possible but results in a smaller field of view and increased distortion (spherical aberration).
