Microscope is an optical device which produces a highly magnified image of a very small object.
Simple microscope is nothing but a single biconvex lens.
Magnifying power of an astronomical telescope may be defined as the ratio of the angle subtended at the eye by the image to the angle subtended at the eye by the object.
Compound Microscope is an optical instrument which is used to magnify very small objects like blood cells and bacteria.
Telescope is an optical instrument which is used for viewing heavenly bodies and distant objects.
