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Armand Hippolyte Fizeau was the first to determine the light speed in an Earth-based experiment by sending light through periodically spaced openings in a fast rotating wheel, then reflecting the light in a mirror placed D = 10.000 km away. When the wheel rotation was just right, the reflected light would again pass through a hole in the wheel to be observed. In the diagram, the radius of the wheel (the distance from the centre to the inner edge of the cuts) r = 0.250 m, the wheel has 22 cuts as shown. (a) Determine the separation between two adjacent cuts on the wheel. observer light source partially reflecting mirror toothed wheel (b) If the period of wheel rotation, T = 2.5 x 10³s determine the tangential speed of the inner edge of the cuts. Montmartre (c) The speed of light measured by Fizeau was 3.15 x 108 m/s. Determine the period of wheel rotation for the measurement.

Armand Hippolyte Fizeau was the first to determine the light speed in an Earth-based experiment by sending light through periodically spaced openings in a fast rotating wheel, then reflecting the light in a mirror placed D = 10.000 km away. When the wheel rotation was just right, the reflected light would again pass through a hole in the wheel to be observed. In the diagram, the radius of the wheel (the distance from the centre to the inner edge of the cuts) r = 0.250 m, the wheel has 22 cuts as shown. (a) Determine the separation between two adjacent cuts on the wheel. observer light source partially reflecting mirror toothed wheel (b) If the period of wheel rotation, T = 2.5 x 10³s determine the tangential speed of the inner edge of the cuts. Montmartre (c) The speed of light measured by Fizeau was 3.15 x 108 m/s. Determine the period of wheel rotation for the measurement.

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Armand Hippolyte Fizeau was the first to determine the light light speed in an Earth-based experiment by sending source light through periodically spaced openings in a fast rotating wheel, then reflecting the light in a mirror placed D = 10.000 km away. When the wheel rotation was just right, the reflected light would again pass through a hole in the wheel to be observed. In the diagram, the radius of the wheel (the distance from the centre to the inner edge of the cuts) r= 0.250 partially reflecting mirror observer m, the wheel has 22 cuts as shown. Montmartre toothed wheel (a) Determine the separation between two adjacent cuts on the wheel. (b) If the period of wheel rotation, T 2.5 x 10s determine the tangential speed of the inner edge of the cuts. (c) The speed of light measured by Fizeau was 3.15 x 10° m/s. Determine the period of wheel rotation for the measurement.
Transcribed Image Text:Armand Hippolyte Fizeau was the first to determine the light light speed in an Earth-based experiment by sending source light through periodically spaced openings in a fast rotating wheel, then reflecting the light in a mirror placed D = 10.000 km away. When the wheel rotation was just right, the reflected light would again pass through a hole in the wheel to be observed. In the diagram, the radius of the wheel (the distance from the centre to the inner edge of the cuts) r= 0.250 partially reflecting mirror observer m, the wheel has 22 cuts as shown. Montmartre toothed wheel (a) Determine the separation between two adjacent cuts on the wheel. (b) If the period of wheel rotation, T 2.5 x 10s determine the tangential speed of the inner edge of the cuts. (c) The speed of light measured by Fizeau was 3.15 x 10° m/s. Determine the period of wheel rotation for the measurement.
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