d- B 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 d is known.

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Chapter1: Units, Trigonometry. And Vectors
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In an experiment to measure the speed of light using the apparatus of Armand H. L. Fizeau (as shown), the distance between light source and mirror was 11.45 km and the wheel had 720 notches. The experimentally determined value of c was 2.998 × 108 m/s when the outgoing light passed through one notch and then returned through the next notch. Calculate the minimum angular speed of the wheel for this experiment.

d-
B
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 d is known.
Transcribed Image Text:d- B 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 d is known.
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