11. Monochromaticity is achieved either with a crystal monochromator or a time of flight spectrometer. 12. Some of the feasible crystal monochromator reflections and energy analyzer reflections have been tabulated. 13. Historically, spectrophotometers use a monochromator containing a diffraction grating to produce the analytical spectrum. 14. Flame photometry is crude but cheap compared to spectrophotometer ( which uses a monochromator ). 15. Electromagnetic radiation from the illuminated spot is collected with a lens and sent through a monochromator . 16. A monochromator is used to sample wavelengths from the source and essentially produce a monochromatic signal. 17. The other involves measuring the momentum of the scattered He atoms by a LiF grating monochromator . 18. An alternate method for acquiring spectra is the " dispersive " or " scanning monochromator " method. 19. The light emitted by the sample molecule is passed through a monochromator to select a specific wavelength. 20. Optical spectrum analyzers also exist, which use direct optical techniques such as a monochromator to make measurements.
