Question

A thin lens with focal length f to be used as a magnifying glass. Which of the following statements regarding the situation is true?
(a) A converging lens may be used, and the object be placed at a distance greater than 2f from the lens.
(b) A diverging lens may be used, and the object be placed between f and 2f from the lens.
(c) A converging lens may be used, and the object be placed at a distance less than f from the lens.
(d) A diverging lens may be used, and the object be placed at any point other than the focal point

Answer 1

Hint: The process of determining or following (tracing) the routes that light rays traverse is known as ray tracing. Experiments and personal observations demonstrate that when light interacts with things several times its wavelength, it travels in straight lines and behaves like a ray. (A ray is a straight line that starts at a single point.) In these circumstances, its wave qualities aren't as noticeable.

Complete Step By Step Answer:
A magnifying glass is a convex lens that is used to magnify an object's image. Typically, the lens is housed in a frame with a grip. A magnifying glass can be used to concentrate light, such as the sun's rays, to generate a hot spot at the focal point for fire starting.
A sheet magnifier is made up of a series of very narrow concentric ring-shaped lenses that work together as a single lens but are significantly thinner. A Fresnel lens is the name for this configuration.
A magnifying glass' magnification is determined by the distance between the user's eye and the thing being viewed, as well as the overall distance between them. Angular magnification is comparable to magnifying power (this should not be confused with optical power, which is a different quantity). The ratio between the sizes of the pictures generated on the user's retina with and without the lens called the magnifying power.
If an item is positioned at a distance shorter than the focal length of the lens, a converging lens amplifies the picture.
Hence option c is correct.

Note:
If both surfaces of a lens are convex, it is called biconvex (or double convex, or simply convex). The lens is equiconvex if both surfaces have the same radius of curvature. Biconcave refers to a lens having two concave sides (or just concave). The lens is plano-convex or plano-concave depending on the curvature of the other surface if one of the surfaces is flat.