Spectroscopy
Vibrational spectroscopy is

an Infrared spectroscopy
a large mass on a weak spring
a flashlight through a prism and shake it
a class of spectroscopic techniques which analyzes molecular motions

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Spectroscopy
In the past, IR spectra had to be aquired one wavelength at a time, which took a long time. Today quick spectra is due to the

None of these
light is faster today that it used to be
absence of broad spectrum of wavelenth
the Fourier Transfer Algorithm allows us to scan all frequencies at once

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