With the help of labelled diagram, give the principle and magnifying power of compound microscope, when final image is formed at least distance of distinct vision.

Draw a ray diagram of compound microscope for the final image formed at least distance of distinct vision?

With the help of ray diagram, describe the constru¬ ction, working of acompound microscope when the final image is formed at least distance of distinct vision (D = 25 cm). Derive an expression for its magnifying power (m)

With the help of labelled diagram, give the principle, construction and theory of cylotron.

What is the magnifying power of an astronomical telescope when the final image of a distant object is formed at least distance of distinct vision?