Philip Ball looks at how a little-known paper by Niels Bohr demonstrates the turmoil in physics on the brink of quantum ...

A new theoretical approach is proposed to explain the nature of the well-known narrow and intense optical J-band of ...

Colors of emission spectra are due to loosely-bound valence electrons being excited in a flame and dropping back down while emitting light. Warning! Once the flame has started, DO NOT add more ...

The first NMR spectra were first published in the same issue of Physical ... The NMR phenomenon relies on the interaction of the nuclei of certain atomic isotopes with a static magnetic field. This ...

IN his letter to NATURE of January 1 on “tomic Models and X-Ray Spectra,” Dr. F. A. Lindemann deals with the approximate agreement between the recent experiments of Mr. H. G. J. Moseley on ...

The authors demonstrate how this framework enables the prediction of 3D atomic arrangements from XANES spectra. "Our method bridges a crucial gap between spectroscopic analysis and precise ...

This causes an absorption spectra, as shown below. Because the energy levels are the same, the lines in the emission spectra of an element are in the same position as the lines in the absorption ...

By applying quantum theory, Bohr demonstrated that the observed spectra of hydrogen could be ... It provided a framework for understanding atomic structure, which was essential for the later ...