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Foucault pendulum through basic geometry
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10.1119/1.2757623
/content/aapt/journal/ajp/75/10/10.1119/1.2757623
http://aip.metastore.ingenta.com/content/aapt/journal/ajp/75/10/10.1119/1.2757623
View: Figures

Figures

Image of Fig. 1.
Fig. 1.

The orientation of the plane of oscillation slowly rotates during the course of the day, in general not returning to its original orientation , but resulting in a final orientation differing from by an angle .

Image of Fig. 2.
Fig. 2.

A “belt” of height on the sphere. Archimedes had a diagram with a sphere and cylinder of same height and diameter inscribed on his tombstone. He was the first to show that the two figures have the same area by proving that the area of the belt of height on the sphere has the same area as a cylinder of the same radius as the sphere and height .

Image of Fig. 3.
Fig. 3.

The pendulum as a compass. When an oscillating pendulum is picked up at its suspension point and moved in the plane, the angle its plane of oscillation makes with a straight line path remains constant, but the angle it makes with a curved path changes.

Image of Fig. 4.
Fig. 4.

A triangle on the sphere. All sides are segments of great circles. When a pendulum is taken along a triangular path, the angle the orientation of the pendulum makes with the great circle segments remains constant along each segment. Thus, only the angles contribute to the phase shift.

Image of Fig. 5.
Fig. 5.

The figure obtained after cutting the sphere along the great circles making up the sides of the triangle and gluing together the original triangle and the three neighboring pieces.

Image of Fig. 6.
Fig. 6.

Polygon on the sphere. All segments are great circles. The polygon can be subdivided into several triangles.

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/content/aapt/journal/ajp/75/10/10.1119/1.2757623
2007-10-01
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Foucault pendulum through basic geometry
http://aip.metastore.ingenta.com/content/aapt/journal/ajp/75/10/10.1119/1.2757623
10.1119/1.2757623
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