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P. 3857. Thomas is long-sighted. He is able to see clearly only those objects which are at least 1 m away. Find the power of the glasses through which he is able to read a book 25 cm away from his eyes.

(3 points)

Deadline expired on 13 February 2006.

Statistics on problem P. 3857.
 116 students sent a solution. 3 points: 85 students. 0 point: 23 students. Unfair, not evaluated: 8 solutions.

• Problems in Physics of KöMaL, January 2006

•  Támogatóink: Morgan Stanley