IN recent papers I have discussed the continuous spectrum of mercury and its association with the resonance line λ2537. Prof. R. W. Wood showed in 1909 that the green visual fluorescence of mercury ...

IN spectroscopic literature there are many casual references to a continuous background in the vacuum tube spectra of various gases, such as oxygen, chlorine, etc. Usually these observations appear to ...

As a tool of analysis in physics, wavefields are often expanded in a set of eigensolutions obtained from a Sturm-Liouville problem. For singular Sturm-Liouville problems subject to radiation boundary ...