Heike Kamerlingh Onnes(redirected from H K Onnes)
Onnes, Heike Kamerlingh:see Kamerlingh Onnes, HeikeKamerlingh Onnes, Heike
, 1853–1926, Dutch physicist. He was, from 1882, professor of physics at the Univ. of Leiden. He made important studies of the properties of helium and, in attempting to solidify it, produced a temperature within one degree of absolute zero.
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Kamerlingh Onnes, Heike(hī`kə kä`mərlĭng ôn`əs), 1853–1926, Dutch physicist. He was, from 1882, professor of physics at the Univ. of Leiden. He made important studies of the properties of helium and, in attempting to solidify it, produced a temperature within one degree of absolute zero. In the course of his low temperature experiments, he discovered the property of superconductivitysuperconductivity,
abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped suddenly to zero at a temperature of about 4.
..... Click the link for more information. in certain metals. For these researches he received the 1913 Nobel Prize in Physics.
Kamerlingh Onnes, Heike
Born Sept. 21, 1853, in Groningen; died Feb. 21, 1926, in Leiden. Dutch physicist and chemist. Doctor of philosophical sciences (1879). Professor at the University of Leiden from 1882 to 1924.
In an effort to obtain liquid helium, Kamerlingh Onnes organized a specially equipped cryogenic laboratory at the University of Leiden, which became a world center for low-temperature physics and was subsequently named after him. Here he first achieved temperatures close to absolute zero and in 1908 obtained liquid helium. Kamerlingh Onnes studied the physical properties of various substances at low temperatures, especially those of mercury, lead, and tin. While investigating the electrical resistance of mercury in 1911, he observed that the resistance disappeared at a temperature of 4. 1°K. This phenomenon was called superconductivity. He also worked on thermodynamics, magneto-optics, and radioactivity. Kamerlingh Onnes was awarded a Nobel Prize in 1913.