Q. A simple microscope consists of which of the following lenses? Answer:
a short focus convex lens
Notes: The use of a single short focus convex lens or groups of lenses are found in simple magnification devices such as the magnifying glass, loupes, and eyepieces for telescopes and microscopes. If a convex lens is held close to a person's eyes, they will see an image that is upright and larger than the actual object.