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If a convex lens of focal length 20 cm is held close to the eye of observer and the near point of the observer is 25 cm from the eye, find the distance of the object from the lens. |
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Answer» Solution :`f=+20cm` `v=-25cm` `(1)/(f)=(1)/(v)-(1)/(U)` `(1)/(u)=(1)/(v)-(1)/(f)` `=-(1)/(25)-(1)/(20)` `u=(-100)/(9)CM` |
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