A compound microscope consists of two convex lenses having a focal length of $1.5 \mathrm{cm}$ and $5 \mathrm{cm}$. When an object is kept at a distance of $1.6 \mathrm{cm}$ from the objective, the final image is virtual and lies at a distance of $25 \mathrm{cm}$ from the eyepiece. Calculate magnifying power of the compound microscope in this setup.

Draw a labelled ray diagram of an image formed by a refracting telescope with final image formed at infinity Derive an expression for its magnifying power with the final image at infinity.

In an astronomical telescope of refracting type:

A compound microscope consists of two convex lenses having a focal length of $1.5 \mathrm{cm}$ and $5 \mathrm{cm}$. When an object is kept at a distance of $1.6 \mathrm{cm}$ from the objective, the final image is virtual and lies at a distance of $25 \mathrm{cm}$ from the eyepiece. Calculate magnifying power of the compound microscope in this setup.