Question

find the focal length of a lens power +0.5d​

Answer 1

Answer: Focal length of lens = 200 cm, Convex Lens.

Explanation: The power of lens given in the question is 0.5D. ...

D=100/f(cm) Putting the value of Power = 0.5D, we get:

0.5=100/f. Therefore, the focal length of lens is.

or, 2m.