SPECTROSCOPY QUIZ

The entrance slit

The diffraction grating

None of these

The collimating lens

when the amplitudes are the same.

at no time.

at anytime.

when the frequencies match exactly

an Infrared spectroscopy

a flashlight through a prism and shake it

a large mass on a weak spring

a class of spectroscopic techniques which analyzes molecular motions

A small mass on a weak spring

A large mass on a weak spring

A small mass on a stiff spring

A large mass on a stiff spring

amount of light absorbed per unit concentration

None of these

amount of light reflected and absorbed per unit concentration

amount of light absorbed per unit length

3640-3250

1740-1720

1870-1650

160-110

Because %T cannot be measured as accurately as absorbance

Because absorbance is proportional to the concentration of the analyte, whereas %T is not

Because %T is dependant on the power of the incident radiation

None of these

moderate

large

small

none of these

Rocking

Stretching

Rolling

Scissoring

All of these

Because the energy required to induce a rotational transition is so small that it cannot be measured

Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions

Because rotational transitions are extremely rare