Spectroscopy
A simple harmonic oscillator may absorb energy

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

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Spectroscopy
Vibrational spectroscopy is

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

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Spectroscopy
Why are rotational transitions of little use to a spectroscopist?

Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
Because the energy required to induce a rotational transition is so small that it cannot be measured
Because rotational transitions are extremely rare
All of these

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

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

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Spectroscopy
Beer's Law states that

None of these
absorbance is equal to P0 / P
absorbance is proportional to both the path length and concentration of the absorbing species
absorbance is proportional to the log of the concentration of the absorbing species

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