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November 23, 2014

Homework Help: physics

Posted by Chan on Monday, April 19, 2010 at 4:12am.

Please, anyone help me please.
Q: An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. (Take the direction to the right to be positive.)

(a) Find the position q1 of the image formed by the first converging lens.
so, this what I try but, it not right
1/f2=1/q1+1/p1= 1/13-1/17.8=5/234, 234/5= 47cm and it not right answer.

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