Verified answer

Answer:

the power of a lens is 2 D.

Explanation:

• The power of a lens is its ability to converge or diverge the rays of light falling on it.
• The power of a lens is equal to the reciprocal of the focal length of the lens. The focal length must be in meters.
• P=1/f

• From the question putting the value of focal length we get
• P= 1/0.5
• = 2D
• SI unit of power is dioptre (D).
• plssssssssss mark me the brainliest