A person with myopia can see objects placed at a distance of 4m.if he wants to se objects at a distance of 20m,what should be the focal length and Power of the concave lens he must wear?
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A person with myopia can see objects placed at a distance of 4m.if he wants to se objects at a distance of 20m,what should be the focal length and Power of the concave lens he must wear?
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