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Question 21 (1 point) What does a monochromator do? Allows for all wavelengths of light to be selected and transmitted through the sample Emits electrons when struck by a photon allowing for light energy to be detected Monochromators are no longer used Splits light into its components wavelengths and selects a specific wavelength for transmission through the sample Reduces the frequency of source radiation Question 22 (1 point) How does a Fourier Transform Infrared (FTIR) Spectrophotometer work? An interferometer creates interfering waves of infrared radiation that pass through a sample creating an interferogram that is converted into its component wavelengths using a Fourier Transformation O A beamsplitter transmits 100% of the source infrared radiation through a sample to create an excitation spectrum Ultraviolet radiation passes through a sample and is absorbed by an analyte and the difference between the radiation before and after is interpreted using a Fourier Transformation A monochromator creates interfering waves of IR radiation that pass through a sample creating an interferogram that is converted into its component wavelengths using a Fourier Transformation A polychromator creates interfering waves of infrared radiation that pass through a sample creating an polychromatogram that is converted into its component wavelengths using a Fourier Transformation Question 23 (1 point) An emission spectrum is: When the emission wavelength of a fluorescence spectrophotometer is fixed and all wavelengths of the excitation radiation are varied When the emission wavelength of FTIR spectrophotometer is fixed and all wavelengths of the excitation radiation are varied When the excitation wavelength of an FTIR spectrophotometer is fixed and all wavelengths of the emitted radiation are measured When the excitation wavelength of a fluorescence spectrophotometer is fixed and all wavelengths of the emitted radiation are measured None of the selectable options