The “new” ohm and the “new” volt already exist. However, they have not yet truly established themselves within the international system of units (SI). This is about to change with the “new” ampere.…
Precision measurements of the magnetic properties of the electron have played an important role in the development of quantum electrodynamics (QED). In 1947, for example, a value had been measured…
Optical frequency combs have revolutionized frequency measurement in visible light and UV radiation. Theodor Hänsch and John Hall were awarded the 2005 Nobel Prize for physics for developing…
The miniaturized Mössbauer spectrometer (MIMOS), which was developed and constructed under the leadership of Dr. Göstar Klingelhöfer by his teams at the University of Darmstadt and later at the…
To diagnose diverse diseases of the human heart, it is important to measure the myocardial microcirculation (i.e. the blood circulation in the capillaries of the myocardium) as accurately as…
The fine-structure constant ? determines the strength of the electromagnetic interaction. The size of this important natural constant has been determined in various ways: by means of the hyperfine…
Due to its cost-effectiveness and excellent painting results, powder coating with solvent-free paint is applied in a variety of ways, e.g. when manufacturing household appliances and in automobile…
Of all the atoms, the hydrogen atom has the simplest structure as it only consists of one proton and one electron. Therefore, it is possible to calculate the atomic excitation frequencies of…
The values of electrical DC voltages and resistances can be reproduced with a relative uncertainty of 10–9 by means of the Josephson and quantum Hall effects. For AC voltages and alternating…
In 1987, the Helmholtz Prize was awarded for the first time for work in the field of "Physical Metrology in Medicine, Radiation Protection and Environmental Protection". The…
