ØThe lamp emits all colors of light (i.e., white
light).
Ø
ØThe monochromator selects one
wavelength
and that wavelength is sent through
the sample.
Ø
ØThe detector detects the wavelength of
light that has passed through the
sample.
Ø
ØThe amplifier increases the signal so
that it is easier to
read against the background noise.