claim: In the British Virgin Islands and Turks and Caicos Islands, the United States dollar is the sole currency.
evidence: Theodor Wolfgang Hansch -LRB- born 30 October 1941 -RRB- is a German physicist .. German. Germany. physicist. physics. He received one fourth of the 2005 Nobel Prize in Physics for `` contributions to the development of laser-based precision spectroscopy , including the optical frequency comb technique '' , sharing the prize with John L. Hall and Roy J. Glauber .. Physics. Physics. spectroscopy. spectroscopy. Nobel Prize in Physics. Nobel Prize in Physics. laser. laser. frequency comb. frequency comb. John L. Hall. John L. Hall. Roy J. Glauber. Roy J. Glauber. Hansch is Director of the Max-Planck-Institut fur Quantenoptik -LRB- quantum optics -RRB- and Professor of experimental physics and laser spectroscopy at the Ludwig-Maximilians University in Munich , Bavaria , Germany .. Germany. Germany. Ludwig-Maximilians University. Ludwig-Maximilians University. Max-Planck-Institut. Max Planck Institute. spectroscopy. spectroscopy. laser. laser. Max-Planck-Institut fur Quantenoptik. Max Planck Institute of Quantum Optics. quantum optics. quantum optics. Professor. Professor. laser spectroscopy. laser spectroscopy. Munich. Munich. Bavaria. Bavaria. Hansch gained his Diplom and doctoral degree from Ruprecht-Karls-Universitat Heidelberg in 1960s .. Heidelberg. Heidelberg. Diplom. Diplom. doctoral degree. doctoral degree. Ruprecht-Karls-Universitat Heidelberg. Ruprecht-Karls-Universitat Heidelberg. Subsequently , he became a professor at Stanford University , California from 1975 to 1986 .. Stanford University. Stanford University. California. California. He was awarded the Comstock Prize in Physics from the National Academy of Sciences in 1983 .. Physics. Physics. Comstock Prize in Physics. Comstock Prize in Physics. National Academy of Sciences. United States National Academy of Sciences. In 1986 , he received the Albert A. Michelson Medal from the Franklin Institute .. Michelson Medal. Michelson Medal. Albert A. Michelson Medal. Albert A. Michelson Medal. Franklin Institute. Franklin Institute. In the same year Hansch returned to Germany to head the Max-Planck-Institut fur Quantenoptik .. Germany. Germany. Max-Planck-Institut. Max Planck Institute. Max-Planck-Institut fur Quantenoptik. Max Planck Institute of Quantum Optics. In 1989 , he received the Gottfried Wilhelm Leibniz Prize of the Deutsche Forschungsgemeinschaft , which is the highest honour awarded in German research .. Gottfried Wilhelm Leibniz Prize. Gottfried Wilhelm Leibniz Prize. German. Germany. Deutsche Forschungsgemeinschaft. Deutsche Forschungsgemeinschaft. In 2005 , he also received the Otto Hahn Award of the City of Frankfurt am Main , the Society of German Chemists and the German Physical Society .. German. Germany. Frankfurt am Main. Frankfurt am Main. In that same year , the Optical Society of America awarded him the Frederic Ives Medal and the status of honorary member in 2008 .. Optical Society of America. Optical Society of America. One of his students , Carl E. Wieman , received the Nobel Prize in Physics in 2001 .. Physics. Physics. Carl E. Wieman. Carl E. Wieman. Nobel Prize in Physics. Nobel Prize in Physics. In 1970 he invented a new type of laser which generated light pulses with an extremely high spectral resolution -LRB- i.e. all the photons emitted from the laser had nearly the same energy , to a precision of 1 part in a million -RRB- .. laser. laser. spectral. Electromagnetic spectrum. Using this device he succeeded to measure the transition frequency of the Balmer line of atomic hydrogen with a much higher precision than before .. Balmer line. Balmer line. hydrogen. hydrogen. During the late 1990s , he and his coworkers developed a new method to measure the frequency of laser light to an even higher precision , using a device called the optical frequency comb generator .. laser. laser. frequency comb. frequency comb. comb generator. comb generator. This invention was then used to measure the Lyman line of atomic hydrogen to an extraordinary precision of 1 part in a hundred trillion .. hydrogen. hydrogen. Lyman. Lyman series. At such a high precision , it became possible to search for possible changes in the fundamental physical constants of the universe over time .. For these achievements he became co-recipient of the Nobel Prize in Physics for 2005 .. Physics. Physics. Nobel Prize in Physics. Nobel Prize in Physics