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3. In the following diagram, let's use a gear with 30 evenly spaced teeth and a distance D of 12.5 kilometers. The speed of rotation

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3. In the following diagram, let's use a gear with 30 evenly spaced teeth and a distance D of 12.5 kilometers. The speed of rotation is adjusted so that an outgoing pulse is blocked by the next tooth when it comes back. We estimate the angular speed of the gear to be 180 revolutions per second. What speed of light do we get? D Light source Toothed Mirror wheel

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