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In an experiment to measure1 the focal length f... - WAEC Physics 1992 Question

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
correct option: e
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