Question

8. A doctor has prescribed a corrective lens of power +3D. Find the focal length
of the lens.

Answer 1

Answer:

P=1/f

3=1/f

F=1/3

f=0.33 m

Answer 2

Answer:

p=1/f

Explanation:

therefore,

3=1/f

f=1/3

f=0.33m