Question

The focal length of a convex lens is always positive.

• A. True
• B. False

Answer 1

The correct option is A True

1. The convex lens converges the rays of incident light falling on its surface.
2. The image formed by the convex lens is through the convergence of light.
3. Thus, it is also called the convergent lens.
4. The focal length is always taken as positive for a convex lens.
5. This can also be explained using the Lens Makers formula.

Hence, the statement is true.