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Calculate the minimum angular speed of the wheel for light that passed through opening A to return through opening C to reach the observer. In an experiment to measure the speed of light using the apparatus of Fizeau, the distance between the toothed wheel and mirror was 10.61 km and the wheel had 705 notches. The experimentally determined value of c was 2.95 Ă— 108 m/s . Answer in units of rad/s.
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