Ans. RESOLVING POWER
The ability of an instrument to distinguish between two closely placed objects or point sources is called resolving power.
MAGNIFYING POWER
The angular magnification or magnifying power is the angular size of the final image produced by the magnifying glass divided by an angular size of the object seen without the magnifying glass.
Angular size of final image produced by magnifying glass Let Angular size of object seen without magnifying glass
If 9' is the angular size of the final image q^
produced by the magnifying glass and 6 is the angular j size of the object seen without the magnifying glass, - n
then magnifying power can be written as:
indicates that the lens produces virtual
image which is enlarged and upright with respect to he a. object. If do is the near distance of the object from eye
which is usually equal to 25 cm, then magnifying power becomes: Image formation.