Question

What is magnifying glass? State its two uses.

Answer 1

Hint: Convex mirrors are generally used for creating magnifying glasses. In order to obtain a magnifying glass, two convex mirrors are arranged back-to-back. Convex mirrors are also utilized for security purposes in several places. They are areas near ATMs so that bank customers can verify if someone is following them.

Complete step-by-step solution:
A magnifying glass is the alternate name of a convex lens used to generate a magnified object image. The lens is positioned in a frame with a holder. A magnifying glass can be applied to focus light, such as concentrating the sun's radiation to produce a hot spot at the focus for fire outset.
The magnifying glass's magnification depends on the fixed position between the user's eye and the observed object and the total distance between them. The magnifying power is similar to angular magnification—the ratio of image sizes made on the user's retina with lens and without the lens. For the "without" case, it is typically thought that the user would take the object as near to one eye as desirable without it displaying blurry. It is known as the near point of accommodation, changes with time.
Convex mirrors are also used in various places like street light reflectors to spread light over more significant areas. They are used to produce telescope and ceiling top mirrors. Convex mirrors are used as rear-view mirrors because they can deviate light beams and produce virtual images. Large offices, hospitals, and stores use a convex mirror to make people see around the corner to avoid running into each other and prevent any collision. The convex mirror constantly forms a virtual object image, and the image made by the convex mirror is less than the size of the object. Therefore, the most popular convex mirror uses are locations where more significant objects are viewed in a smaller size. Since convex mirrors have a broader view field than concave mirrors and plane mirrors, they are mainly used inside mirrors of automobiles.

Note: The highest magnifying power is achieved by putting the lens near one eye and transferring the eye and the lens to obtain the most desirable focus. The object will typically also be near to the lens. The eye can then be a more considerable distance away, and a good image can be obtained very quickly; the focus is not very sensitive to the eye's exact position. At higher magnifications, the image feature of a magnifying glass becomes insufficient due to optical irregularities, especially spherical aberration. When a better image is needed, other types of hand magnifiers are used. Even better images can be achieved with a multiple-lens magnifier.