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 ...

To see the various colors that make up starlight, astronomers can use a prism to separate the colors. Common elements like helium and calcium in the atmospheres of stars block certain colors of light, ...

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 ...

Action spectra for the inhibition by continuous (24-hour) irradiation of hypocotyl growth in 54-hour-old Sinapis alba L. seedlings were measured using seedlings which had had four different ...