An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through a slot at the outside edge of the wheel, as in the 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 3.23 cm and 130 slots at its edge. Measurements taken when the mirror is L- 1090 m from the wheel indicate a speed of light of 3.00 x 105 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? (a) Number (b) Number i Light source Units Units Light beam Rotating slotted wheel Mirror perpendicular to light beam

An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through a slot at the outside edge of the wheel, as in the 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 3.23 cm and 130 slots at its edge. Measurements taken when the mirror is L- 1090 m from the wheel indicate a speed of light of 3.00 x 105 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? (a) Number (b) Number i Light source Units Units Light beam Rotating slotted wheel Mirror perpendicular to light beam