Spectroscopy
A simple harmonic oscillator may absorb energy

when the frequencies match exactly
when the amplitudes are the same.
at no time.
at anytime.

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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
absence of broad spectrum of wavelenth
the Fourier Transfer Algorithm allows us to scan all frequencies at once
light is faster today that it used to be

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Spectroscopy
Vibrational spectroscopy is

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

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