A simple microscope consists of : A. A short focus convex lens B. A long focus convex lens C. A short focus concave lens D. A long focus concave lens

The correct answer is: A. A short focus convex lens.

A simple microscope consists of a single convex lens. The lens is used to magnify an object by bending the light rays that pass through it. The closer the object is to the lens, the larger the image will be.

A short focus convex lens has a shorter focal length than a long focus convex lens. This means that it can magnify an object more than a long focus convex lens.

A concave lens is a lens that curves inward. It does not magnify objects, but it can be used to correct vision problems such as nearsightedness.

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