Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases ...

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 ...

Assuming that the wide sense stationary process being sampled has an absolutely continuous spectrum, Parzen [5] has shown the consistency of a general class of estimators for estimating the spectral ...