Answer:
Explanation:
The power of the eye is given as
P = 1/di + 1/do
P is power of the eye
di is distance between eye lens and image
do is distance between eye lens and image
Given that,
P = 51.1 d
Note: the power unit "d" is called dioptre and it means per meter
If the person is seeing clearly, the distance between the eye lense and the image (di) must be equal to the distance between the eye lenses and the retina which is 2cm
Thus, di = 2cm = 0.02m
P = 1/di + 1/do
1/do = P — 1/di
1/do = 51.1 — 1/0.02
1/do = 51.1—50
1/do = 1.1m
taking reciprocal
do = 1/1.1
do = 0.9091m
Then, do = 90.91cm
The far point the person can see is 90.91cm
