Assume Fizeau’s wheel has 360 teeth and rotates at 55.0 rev/s when a pulse of light passing through opening A as shown passes through opening C on its return. If the distance to the mirror is 7 500 m, what is the speed of light? d-ToothedwheelMirrorFigure 34.2 Fizeau's method formeasuring the speed of light usinga rotating toothed wheel. Thelight source is considered to be atthe location of the wheel; there-fore, the distance dis known.

Fizeau's experiment: C=2LNn- - -1 where, C is the speed of light L is the distance to the mirror N…

Assume Fizeau’s wheel has 360 teeth and rotates at 55.0 rev/s when a pulse of light passing through opening A as shown passes through opening C on its return. If the distance to the mirror is 7 500 m, what is the speed of light?

Assume Fizeau’s wheel has 360 teeth and rotates at 55.0 rev/s when a pulse of light passing through opening A as shown passes through opening C on its return. If the distance to the mirror is 7 500 m, what is the speed of light?

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Question

d-
Toothed
wheel
Mirror
Figure 34.2 Fizeau's method for
measuring the speed of light using
a rotating toothed wheel. The
light source is considered to be at
the location of the wheel; there-
fore, the distance dis known.

Definition Definition Rate at which light travels, measured in a vacuum. The speed of light is a universal physical constant used in many areas of physics, most commonly denoted by the letter c . The value of the speed of light c = 299,792,458 m/s, but for most of the calculations, the value of the speed of light is approximated as c = 3 x 10 8 m/s.

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