(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In an experiment to measure the speed of light using the apparatus of Fizeau, the distance between light source and mirror was 11.45 km and the wheel had 720 notches. The experimentally determined value of c was 2.889 x 10^8 m/s. Calculate the minimum angular speed of the wheel for this experiment.

2. Relevant equations

c = 2d/t

t = theta/w

3. The attempt at a solution

2.998 x 10^8 m/s = 2(11450m) / t

t = 7.638 x 10^-5 s

7.368 x 10^-5 = (1/440 rev) / w

w = 9.091 rev/s

9.091 * 2pi = 57.12 rad/s

Book answer: 114 rad/s

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# Homework Help: Another Measurement of Speed of Light

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