Question: What was the nationality of the namesake of the Foucault crater?

full_context: Document 1: Léon Foucault: Jean Bernard Léon Foucault (] ; 18 September 1819 – 11 February 1868) was a French physicist best known for his demonstration of the Foucault pendulum, a device demonstrating the effect of the Earth's rotation. He also made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope.
Document 2: Lyapunov (crater): Lyapunov is a lunar crater named for Aleksandr Lyapunov that is located along the east-northeastern limb of the Moon, and is viewed from the side by observers on Earth. The eastern rim of this crater just falls into the section of the Moon called the far side, and visibility of this formation is affected by libration.
Document 3: Lunar south pole: The lunar south pole is of special interest to scientists because of the postulated occurrence of water ice in permanently shadowed areas around it. Of the lunar poles, the south pole is of greater interest because the area that remains in shadow is much larger than that at the north pole. The lunar south pole craters are unique in that sunlight does not reach the bottom. Such craters are cold traps that contain a fossil record of the early solar system.
Document 4: Harpalus (crater): Harpalus is a young lunar impact crater that lies on the Mare Frigoris, at the eastern edge of the Sinus Roris. To the southeast at the edge of the mare is the small crater Foucault, and to the northwest on the opposite edge is the walled plain named South.
Document 5: Faraday (disambiguation): Michael Faraday was an early 19th-century British scientist (physicist and chemist).
Document 6: Humboldt (crater): Humboldt is a large lunar crater that is located near the eastern limb of the Moon. Due to foreshortening this formation has an extremely oblong appearance. The actual shape of the crater is an irregular circle, with a significant indentation along the southeastern rim where the prominent crater Barnard intrudes. To the north-northwest of Humboldt is the large crater Hecataeus. Phillips is attached to the western rim. The rim of Humboldt is low, worn, and irregular in outline. The central peak forms a range on the crater floor. The floor surface contains a network of rilles forming a pattern of radial spokes and concentric arcs. There are also some dark patches located near the walls to the northeast, northwest, and southeast. There is a chain of craters leading from the northwest crater rim to a distance almost as long as the crater is wide. This formation is designated Catena Humboldt. Due to its location near the lunar limb, little detail was known about this crater until it was photographed by orbiting spacecraft (mainly Lunar Orbiter 4).
Document 7: Henri Bénard: Henri Claude Bénard, (25 October 1874 – 29 March 1939), French physicist, best known for his research on convection in liquids that now carries his name, Bénard convection. In addition, the historical surveys of both Tokaty and von Kármán both acknowledge that Bénard studied the vortex shedding phenomenon later named the von Karman vortex street, prior to von Karman's own contributions. Bénard specialized in experimental fluid dynamics, and the use of optical methods to study it. He was a faculty member at the universities at Lyon, Bordeaux, and finally the Sorbonne in Paris.
Document 8: Conical pendulum: A conical pendulum consists of a weight (or bob) fixed on the end of a string or rod suspended from a pivot. Its construction is similar to an ordinary pendulum; however, instead of swinging back and forth, the bob of a conical pendulum moves at a constant speed in a circle with the string (or rod) tracing out a cone. The conical pendulum was first studied by the English scientist Robert Hooke around 1660 as a model for the orbital motion of planets. In 1673 Dutch scientist Christiaan Huygens calculated its period, using his new concept of centrifugal force in his book "Horologium Oscillatorium". Later it was used as the timekeeping element in a few mechanical clocks and other clockwork timing devices.
Document 9: Michael Faraday: Michael Faraday FRS ( ; 22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry. His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis.
Document 10: Foucault (crater): Foucault is a small lunar impact crater that lies along the southern edge of Mare Frigoris, to the southeast of the crater Harpalus. In the rugged terrain to the south of Foucault is Sharp. The outer perimeter of Foucault forms a somewhat irregular circle, with slight outward bulges to the south and northeast. The inner wall of the rim is not notably terraced, and slopes down directly to the uneven floor. It is named after physicist Léon Foucault, most famous for the Foucault pendulum.
Document 11: Plana (crater): Plana is a lunar crater that lies on the boundary between two small lunar mare areas, with Lacus Mortis to the north and the larger Lacus Somniorum on the southern side. At this location, on Earth, the crater appears oval due to foreshortening, but the crater is actually nearly circular. It is joined to the crater Mason to the east by a short stretch of rugged ground. Due north of Plana in the midst of the Lacus Mortis is the prominent crater Bürg.
Document 12: Lev (crater): Lev is a tiny lunar craterlet located in the southeast part of the Mare Crisium in the east of the lunar near side. The crater is located southeast of nearby larger Fahrenheit. It is also in between that crater and Dorsa Harker, a wrinkly ridge. Further southeast is Mons Usov.
Document 13: Bouguer (lunar crater): Bouguer is a lunar impact crater that lies along the southern edge of the Mare Frigoris, to the north of the crater Bianchini. To the west-southwest of Bouguer, along the same shore of the mare, is the crater Foucault. Nearly due west is the more prominent Harpalus, and to the west is La Condamine.
Document 14: Augustin-Jean Fresnel: Augustin-Jean Fresnel ( ; ] ; 10 May 1788 – 14 July 1827) was a French engineer and physicist who contributed significantly to the establishment of the theory of wave optics. Fresnel studied the behaviour of light both theoretically and experimentally.
Document 15: Crookes radiometer: The Crookes radiometer, also known as a light mill, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity. The reason for the rotation was a cause of much scientific debate in the ten years following the invention of the device, but in 1879 the currently accepted explanation for the rotation was published. Today the device is mainly used in physics education as a demonstration of a heat engine run by light energy.
ground_truth: French