what is meant by least distance of distinct vision,What is short sightedness what
kind of lens is used to correct this defect at what distance should an object be
placed from a concave mirror with focal distance 15cm so that a real image of 5
times of the size of object may from find the position of image also.
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it is the minimum distance of out eye lens to see clear image....and it is also the maximum endurance of our eye lens which fical length are adjusted by out ciliary muscles
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