Raman intensities are higher when using shorter-wavelength laser sources. What i

Question

Raman intensities are higher when using shorter-wavelength laser sources. What is the drawback to using a shorter-wavelength laser, other than the cost of the laser? To guide you, calculate

a) The wavelength of the Raman-scattering peak from the 850 cm-1 BF4 vibration in the BF4- anion that you would expect if you use a 785 nm laser;

b) The wavelength of the Raman-scattering peak from the 850 cm-1 BF4 vibration in the BF4- anion that you would expect if you use a 355 nm laser;

c) Use your answers from (a) and (b) to comment on the drawback of using the 355 nm laser.

Explanation / Answer

I only defense to a question of all, for the rest of the wadis attach each questions in a new question and answer gladly.

disadvantages for this wavelength the following:
At low concentrations, the fluorescence intensity will be generally proportional to the concentration of fluorophore.
Several factors influence and distort the spectrum and corrections are needed to achieve 'real' spectrum, that is, spectra, obtained either device. The intensity of light from the source and characteristics of the wavelength varies with time during each experiment and between each experiment, and if we alter the wavelength to a lower, have distortions in the data.

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