Physicshard · Past Paper
A person with Hypermetropia uses a lens of +2.0 D. Where is his near point?
A25 cm
B50 cm
C100 cm
D12.5 cm
✓ Correct Answer: B — 50 cm
1/f = 1/d - 1/D. 2 = 1/0.25 - 1/NP. 2 = 4 - 1/NP. 1/NP = 2. NP = 0.5m = 50cm.
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