An early method of measuring the speed of light makes use of a rotating slotted wheel. A
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An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the slots at the outside edge of the wheel, as in Figure, travels to a distant mirror, and returns to the wheel just in time to pass through the next slot in the wheel. One such slotted wheel has a radius of 5.0 cm and 500 slots around its edge. Measurements taken when the mirror is L = 500 m from the wheel indicate a speed of light of 3.0 x 10s km/s.
(a) What is the (constant) angular speed of the wheel?
(b) What is the linear speed of a point on the edge of the wheel?
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a In the time light takes to go from the wheel to the mirror and back a...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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