A magnifying glass is made of a combination of a convergent lens of power 20D and divergent lens of power 4D. If the least distance of distinct vision is 25cm. The magnifying power is

A magnifying glass is made of a combination of a convergent lens of power 20D and and divergent lens of power 4D. If the least distance of distinct vision is 25cm. The magnifying power is

A magnifying glass is a combination of a convex lens of focal length 5 cm and a concave lens of power - 5D. If the distance of distinct vision 20 cm, calculate the magnifying power of the magnifying glass.

A convex lens of focal length 10 cm and imag formed by it, is at least distance of distinct vision then the magnifying power is

A convex lens of focal length 10 cm and imag formed by it, is at least distance of distinct vision then the magnifying power is

A magnifying glass is a combination of lenses of powers +20 D and -5 D . Calculate the magnifying power of the microscope, if the distance of distinct vision is 25 cm. Also, calculate the size of an object 3 cm high seen through the magnifying glass.

A magnifying glass of focal length f used to see an object placed at a distance u from it forms the virtual image at the least distance of distinct vision D. its magnifying power is given by

A converging lens of power 25 D is used as a simple microscoe.Calculae the magnifying power,if the distance of distinct vision is 25 cm.