In an experiment to measure1 the focal length f of a converging lens object distances u and corresponding image distance were measured and 1/u plotted against 1/v to obtain the graph illustrated. How would f be determined from this graph?

A. f= the slope of the graph
B. f= the intercept on the 1/u axis
C. f =the intercept on the 1/v axis
D. f = reciprocal of the slope
E. f = reciprocal of the intercept on either axes  

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Correct Answer: E