Which of the following statements regarding the lenses is/are correct?

I. Power of a convex lens is represented as a positive number.

II. Power of a concave lens is represented as a negative number.

Both l and ll

The correct answer is option 1. Both l and ll.

The correct statement regarding the lenses is Both I and II.

I. The power of a convex lens is indeed represented as a positive number. The power of a lens is measured in diopters (D), and for a convex lens, which converges light rays, the power is positive.

II. Similarly, the power of a concave lens is represented as a negative number. A concave lens diverges light rays, and its power is indicated with a negative sign to denote its diverging nature.

So, both statements are correct.