A hypermetropic person having near point at a distance of 0.75 m puts on spectacles of power 2.5 D. The near point now is at ____?
Everyday Science / Physics — Multiple-choice practice
- A. 0.36 m
- B. 0.83
- C. None of these
- D. 0.26 m
Correct answer
0.26 m
Explanation
Explanation 1/f = 1/v - 1/u 2.5 = 1/0.75 - 1/u u = -0.26 m So, the new near point is indeed: 0.26 m
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