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Historical Development Some Uses and Definitions 1
Origins of Atomic Spectra
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aberrations absorption analytical angle of incidence aperture aperture stop astigmatism atom axis Balmer series bandwidth Chem collimator lens coma concave grating constant curvature Czerny-Turner detectivity detector developed diagram diffraction diffraction grating Ebert echelle grating electron elements emission energy levels entrance slit equation exit slit flame focal curve focal length focus glass grating mountings grating normal grooves hydrogen illuminated illustrated in Fig increases intensity interferometer lenses light source limit linear dispersion measurements metal minimum deviation monochromator noise obtained off-axis optical plane grating produced quantum number quartz radiant power radiation ratio rays reflection refractive index region resolution resolving power rotation Rowland circle ruled sample sensitivity slit image slit width sodium solid angle spark spec spectral lines spectrochemical analysis spectrograph spectrometer spectroscopic instruments spectroscopic lines spectrum spherical standard Stark effect stray light tables technique temperature tion ultraviolet values vector Wadsworth wavelength range wavenumber Zeeman effect