Answer:
When the object is placed at infinity, the eyemakes use of the least converging power,Therefore, total converging power of corneaand the eye lens = 40 + 20 = 60 dioptre.
Using
i.e.,
To focus the object at the near point,
or
Power dioptre
= 64 dioptre
Power of eye lens = 64 - 40 = 24 dioptre. Therefore, the rough range of eye lens is 20 to
24 dioptre.
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