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April 17, 2014

Homework Help: calculus problem

Posted by roslin on Wednesday, October 27, 2010 at 7:37am.

the thin lens equation in physics is 1/s+1/S=1/f where s is the object distance from the lens,S is the image distance from the lens,and f is the focal length of the lens.Suppose that a certain lens has a focal length of 6cm and that an object is moving toward the lens at the rate of 2cm/s .How fast is the image distance changing at the instant when the object is 10cm from the lens?Is the image moving away from the lens or towards the lens?

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