List of top Physics Questions on Optical Instruments asked in KCET

The final image formed by an astronomical telescope is

For a point object, which of the following always produces virtual image in air?

Two poles are separated by a distance of $3.14\, m$. The resolving power of human eye is $1$ minute of an arc. The maximum distance from which he can identify the two poles distinctly is

The magnifying power of a simple microscope M is given by