Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero. An electric current through a loop of superconducting wire can persist indefinitely with no power source.The superconductivity phenomenon was discovered in 1911 by Dutch physicist Heike Kamerlingh Onnes. Like ferromagnetism and atomic spectral lines, superconductivity is a phenomenon which can only be explained by quantum mechanics. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor during its transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.
In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (183 C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. The cheaply available coolant liquid nitrogen boils at 77 K, and thus the existence of superconductivity at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.
The Dutch (Dutch: Nederlanders) are an ethnic group and nation native to the Netherlands. They share a common ancestry and culture and speak the Dutch language. Dutch people and their descendants are found in migrant communities worldwide, notably in Aruba, Suriname, Guyana, Curaçao, Argentina, Brazil, Canada, Australia, South Africa, New Zealand and the United States. The Low Countries were situated around the border of France and the Holy Roman Empire, forming a part of their respective peripheries and the various territories of which they consisted had become virtually autonomous by the 13th century. Under the Habsburgs, the Netherlands were organised into a single administrative unit, and in the 16th and 17th centuries the Northern Netherlands gained independence from Spain as the Dutch Republic. The high degree of urbanization characteristic of Dutch society was attained at a relatively early date. During the Republic the first series of large-scale Dutch migrations outside of Europe took place.
The Dutch people are often seen as the pioneers of capitalism, and their emphasis on a modern economy, secularism, and a free market has been hugely influential worldwide.The traditional arts and culture of the Dutch encompasses various forms of traditional music, dances, architectural styles and clothing, some of which are globally recognizable. Internationally, Dutch painters such as Rembrandt, Vermeer and Van Gogh are held in high regard. The dominant religion of the Dutch is Christianity, both Catholic and Protestant, but in modern times the majority are no longer religious. Significant percentages of the Dutch are adherents of humanism, agnosticism, atheism or individual spirituality.