Question

A simple magnifying glass consists of a ______.

Options

• concave lens

• convex lens of large focal length

• convex lens of small focal length

• plane mirror only

Answer 1

A simple magnifying glass consists of a convex lens of small focal length.

Explanation:

A simple magnifying glass is a convex lens of small focal length because smaller focal length gives greater magnifying power ($$m = 1 + \frac{D}{f}$$). Concave lenses produce diminished images, and mirrors cannot be looked through.