Question

What is the nature of a lens having a power of + 0.5 D?

Answer 1

Answer:

Lens are convex lens and the person is suffering from hypermetropia or long-sightedness

Answer 2

Nature of Lens is Convex.

Explanation:

• The Power of a Lens is inversely proportional to the Focal length of Lens.

or Power (P) = $\frac {1}{Focal Length}$

• If the value of Focal Length is Negative then the Power is Negative which means that Lens is Concave.

• If the value of Focal Length is positive then the Power is Positive which means that Lens is Convex.

Here, Power = + 0.5 D, Hence, lens is Convex.