phys
5 = 1/f
f =1/5
f = 0.2 m
f = 20cm
The lens is convex lens so the defect is long sightedness.
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A man uses spectacles, power 5D then calculate focal length. what is the vision defect?
phys
5 = 1/f
f =1/5
f = 0.2 m
f = 20cm
The lens is convex lens so the defect is long sightedness.
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