A man wears convex lens glasses of focal length... - JAMB Physics 1998 Question
A man wears convex lens glasses of focal length 40cm in order to correct his eye defect. instead of the optimum 25cm, his least distance of distinct vision is
A
14cm
B
28cm
C
75cm
D
150cm
correct option: d
F = (\frac{uv}{u + v})
F = -ve
v = -ve
- 30 = (\frac {25 {\times} (-v)}{25 + (-v)})
v = 150cm
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