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