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

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Spectroscopy
Why must the voltage supplied to a tungsten lamp be very stable?

All of these
Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage
Because if it wasn't, the lamp would bum out
Because the lamp will only function at a specific voltage

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