Someone with a near point Pn of 25 cm views a thimble
Chapter , Problem 93(choose chapter or problem)
Someone with a near point Pn of 25 cm views a thimble through a simple magnifying lens of focal length 10 cm by placing the lens near his eye. What is the angular magnification of the thimble if it is positioned so that its image appears at (a) Pn and (b) infinity?
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