Question

The power of a lens is -2D, then its focal length is ______ a. -0.5 m b. -0.25 m c. -5.0m d. -50 m​

Answer 1

Answer:

0.5m

hope it's help you!!!

Answer 2

Explanation:

0.25 because when you will 2D with half 4 time the answer will come 0.25