A magnifying glass is used, as the object to be viewed can be brought closer to the eye than the normal near point. This results in

Options

A. a larger angle to be subtended by the object at the eye and hence viewed in greater detail.
B. the formation of a virtual erect image.
C. increase in the field of view.
D. infinite magnification at the near point.

Answer

A, B

Explanation

As shown in the figure, while using convex lens as a magnifying glass, object is placed very close to principal focus but inside it. By doing so, angle made by object at the eye is obtained large and so we can have more angular magnification. Thus, option (A) is correct.
According to above ray diagram, we obtain image A.B. which is virtual, errect and magnified. Thus option (B) is also correct.